Zootaxa 3878 (1): 001–018 www.mapress.com /zootaxa / ISSN 1175-5326 (print edition) Article Copyright © 2014 Magnolia Press ZOOTAXA ISSN 1175-5334 (online edition) http://dx.doi.org/10.11646/zootaxa.3878.1.1 http://zoobank.org/urn:lsid:zoobank.org:pub:FFAA0DB9-C6A4-4963-B60A-2BA9069951A8 Review of the genus Eotilla Schuster, 1949 (Hymenoptera: Bradynobaenidae: Typhoctinae: Eotillini) and description of new species from Argentina JAVIER TORRÉNS1,4, PATRICIO FIDALGO1, ARTURO ROIG-ALSINA2 & DENIS J. BROTHERS3 1 CRILAR-CONICET, Entre Ríos y Mendoza, 5301 Anillaco, La Rioja, Argentina. E-mail: jtorrens@crilar-conicet.gob.ar; pfidalgo@crilar-conicet.gob.ar 2 Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Av. Angel Gallardo 470, 1405 Buenos Aires, Argentina. E-mail: arturo@macn.gov.ar 3 School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg, Private Bag X01, Scottsville, 3209 South Africa. E-mail: brothers@ukzn.ac.za 4 Corresponding author Abstract Diagnoses for the genus Eotilla Schuster, 1949 based on males and females, new generic and specific characters, descriptions of two new Argentinian species (Eotilla schusteri Torréns, Fidalgo, Roig-Alsina & Brothers, sp. nov. and E. medanito Torréns, Fidalgo, Roig-Alsina & Brothers, sp. nov., based on both sexes), a description of the female of E. superba Brothers, 1974 and redescriptions of the males of E. mickeli Schuster, 1949 and E. superba are provided. A key to the species of Eotilla is presented. Key words: Eotilla, diagnosis, key to species Introduction Schuster (1949) described Eotilla and Prototilla and placed them in a new subfamily (Eotillinae) within the family Mutillidae, along with four other subfamilies (Typhoctinae, Apterogyninae, Sphaeropthalminae and Mutillinae) found in the Neotropical region. In phylogenetic studies of Hymenoptera Aculeata, Brothers (1975, 1999) and Brothers and Carpenter (1993) placed Eotillini and Typhoctini as tribes of Typhoctinae, but distant from Mutillidae and relocated within Bradynobaenidae (with Chyphotinae, Apterogyninae and Bradynobaeninae). Recent molecular phylogenetic studies of the superfamily Vespoidea by Pilgrim et al. (2008) indicate that the family Bradynobaenidae—according to the concept of Brothers (1975)—is paraphyletic; they placed Apterogyninae and Bradynobaeninae in Bradynobaenidae within a superfamily Scolioidea, and Chyphotinae and Typhoctinae in Chyphotidae within a superfamily Thynnoidea. This result was utilized by Debevec et al. (2012). Heraty et al. (2011) in their study of the phylogeny of Hymenoptera, confirmed the lack of a close relationship between Mutillidae and Chyphotes Blake, 1886, but showed a close relationship between Chyphotes and Colocistis Krombein, 1942 (their only representative of Tiphiidae). Since the positions of these groups remain in discussion, however, we retain the generally used classification. At present, the Typhoctinae contains two tribes: Typhoctini with Typhoctes Ashmead, 1899 (North and Central America) and Typhoctoides Brothers, 1974 (Chile and Argentina) and Eotillini with Eotilla (Chile and Argentina) and Prototilla (Argentina). The revision of Prototilla by Torréns et al. (2012) included a diagnosis of Eotillini and a comparative table between the two genera of the tribe; two new species based on males and two new species based on females were described and P. typhoctoides (Martinez & Fritz, 1974) (ex Eotilla typhoctoides) was proposed as a new combination. The authors did not include sex associations because of extreme sexual dimorphism, and collection data did not indicate particular associations. Currently, Eotilla comprises two species: the type species, E. mickeli Schuster, 1949 (Chile) and E. superba Brothers, 1974 (Argentina), both based on males. Mickel (1968), however, assigned a female from Argentina to E. Accepted by A. Lelej: 6 Oct. 2014; published: 22 Oct. 2014 1 mickeli. Since then, several Argentinean specimens of both sexes of different species have been collected and we take this opportunity to record these here. In this paper, diagnoses of Eotilla based on males and females are presented, new generic and specific characters are added, and two new species of Eotilla are described from Argentina based on both sexes: E. schusteri Torréns, Fidalgo, Roig-Alsina & Brothers, sp. nov. and E. medanito Torréns, Fidalgo, Roig-Alsina & Brothers, sp. nov.. A description of the female of E. superba and redescriptions of the males of E. mickeli and E. superba are provided. A key to the species concerned is given. Material and methods JT and PF collected males and females using yellow pan traps containing water and a few drops of detergent buried to soil level and cleared daily; in addition, females were collected with pitfall traps containing propylene glycol and covered to prevent the entry of sand and larger animals. The collection methods for other specimens are mostly unrecorded, although a few males were collected in Malaise traps (MT). Most images were obtained using Leica QWin software operating on a Leica M420 Macroscope linked to a Sony PowerHad DXC-950P digital video camera; and Leica Application Suite (version 3.5.0) software operating on a Leica MZ12 stereomicroscope linked to a Leica DFC295 digital video camera. Images were enhanced with COREL PHOTOPAINT and COREL DRAW (version 15); and some images were processed with the computer program DEEP FOCUS by Stuart Ball. A few images were made using a Canon PowerShot G10 camera adapted to a Wild M400 photomacroscope using a Clearshot 600 adapter kit (Alexis Scientific) and stacked using CombineZP software (Hadley 2010). The distribution map was made using Simple Mappr (Shorthouse, 2010). Specimens studied are deposited in the Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Buenos Aires, Argentina (MACN); Instituto Fundación Miguel Lillo, Tucumán, Argentina (IFML); Instituto Argentino de Investigación de Zonas Aridas, Mendoza, Argentina (IADIZA); Museo Nacional de Historia Natural, Santiago, Chile (MNHNS); Los Angeles County Museum of Natural History, Los Angeles, California, USA (LACM); California Academy of Sciences, San Francisco, California, USA (CAS); Canadian National Collection of Insects, Ottawa, Ontario, Canada (CNC); Museum National d’Histoire Naturelle, Paris, France (MNHN); Museum für Naturkunde, Berlin, and the collection of Denis J. Brothers, Pietermaritzburg, South Africa (DJBC) which will be transferred to the Iziko South African Museum, Cape Town, South Africa (SAMC) in due course. Morphological terms are from Brothers (1975), Reid (1941) and Torréns et al. (2012), with details on sculpture from Eady (1968) and Harris (1979). The abbreviations F, S and T refer to numbered flagellomeres, metasomal sterna and metasomal terga, respectively; LOL = lateral ocellar line, OOL = ocellocular line and POL = postocellar line. Mesosomal length was measured between its extremities (excluding the anterior pronotal collar) in dorsal view. Metasomal length was measured from the anterior extremity of the dorsal surface of T1 to the apex of T7, in dorsal view, but adjusted to take into account telescoping of the sclerites so as to reflect the length in a natural condition. Length of T1 was measured laterally, from the base to the posterodorsal apical extremity. Eotilla Schuster, 1949 Eotilla Schuster, 1949: 75–80. Additional citations: Mickel (1968; description of female); Brothers (1970; mention); Brothers (1974; description of male); Brothers (1975; subsequent description); Martinez & Fritz (1974, description of female); Fernández (2001, 2002; list); Brothers (2006; key); Pilgrim et al. (2008; mention); Torréns & Roig-Alsina (2009; mention); Torréns et al. (2012; diagnosis). Type species: Eotilla mickeli Schuster, 1949, by original designation. Diagnosis. Modified from Torréns et al. (2012). Male. Macropterous. Head with ocelli. Antennal scape with a ventral longitudinal carina. Horizontal face of prosternum weakly projecting anteriorly, without a projection posteriorly. Mid coxae moderately separated by a distance equal to half maximum width of femur. Fore wing with two submarginal cells. Hind wing with median cell obliquely truncate at apex, not reaching level of origin of distal hamuli-group; median cell with two veins arising from it (RS and Cu). Tarsal claws smooth, without ventral tooth (see Fig. 11 in Schuster 1949). Genitalia with basal ring anteroventrally broadly emarginate. 2 · Zootaxa 3878 (1) © 2014 Magnolia Press TORRENS ET AL. Female. Apterous. Head without ocelli. Mandible with small preapical denticle on inner edge. Pronotum trapezoidal, with sides strongly convergent to posterior margin; humeral tubercle scarcely developed. Mesopleural longitudinal carina reaching to anterior half of sclerite or beyond but never complete. Mid coxae widely separated by a distance of 1.3 × maximum width of mid femur. Tarsal claws smooth, without ventral tooth. S6 with lateroposterior margin with distinct denticles, although sometimes weak. Key to species of Eotilla Males 1. 2. 3. - Head and mesosoma dark brown to black; metasoma much paler (Fig. 3) . . . . . . . . . . . . . . . . . . . . . . . . . E. medanito sp. nov. Head, mesosoma and metasoma dark brown to black (Figs 1, 2, 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 T1 and T2 with abundant scale-like setae on almost all surfaces in addition to apical fringe (Fig. 15). Frons with scattered erect pale subplumose setae (Fig. 19) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. schusteri sp. nov. T1 and T2 with few or without scale-like setae, except for apical fringe (Figs 9, 11). Frons with scattered erect dark subplumose setae (Figs 17, 18) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 T7 with an inverted-V-shaped depression medially. T2 with a group of scale-like setae on central area (Figs 6, 11). Posteriormost terga and sterna without short and coarse dark setae . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. superba Brothers T7 flattish to convex medially, without an inverted-V-shaped depression. T2 without a group of scale-like setae on central area (Figs 5, 9). Posteriormost terga and sterna with short and coarse dark setae (Figs 9, 10) . . . . . . . . . . . . . . E. mickeli Schuster Females (unknown in E. mickeli) 1. - 2. - Entire metasoma black or T1 and T2 brownish to reddish and remainder black (Figs 30, 31). T2 with abundant scale-like setae, except on central area (Figs 26, 27, 30, 31) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. schusteri sp. nov. Metasoma almost entirely light brown to yellowish or reddish, except sometimes dark brown posteriorly and/or anteriorly (Figs 22–25, 28, 29). T2 at most with a group of scale-like setae on each side of posterior margin (Fig. 28) or without scale-like setae (Figs 25, 29) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 T2 with a group of scale-like setae on each side of posterior margin (Figs 22, 28). General body color light brown to yellowish (Figs 22, 28). Head with scale-like setae, except on gena (Fig. 33) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. superba Brothers T2 entirely without scale-like setae (Figs 23–25, 29). General body color light brown to reddish (Figs 23–25, 29), but sometimes pleura, propodeum, legs and last two or three segments of metasoma with darker brown areas. Head with dense scalelike setae, including on gena (Figs 34, 35) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E. medanito sp. nov. Eotilla mickeli Schuster, 1949 (Figs 1, 5, 9, 10, 17) Eotilla mickeli Schuster, 1949: 77–80; holotype ♂, Chile: Valparaíso, Olmué [32°59'45"S 71°11'29"W] (Museum of Comparative Zoology, Cambridge, Massachusetts, USA), not examined. Diagnosis. Male. Head, mesosoma and metasoma dark brown to black (Figs 1, 5). T1, T2 and S2 with a few scalelike setae only on posterior margin or without (Figs 9, 10). T7 convex, without any inverted-V-shaped depression. Posteriormost terga and sterna with dark, short and coarse setae (Figs 9, 10). Female. Unknown. Redescription. Male. Length 4.4–5.6 mm. General body color black. Antenna, legs and basal part of mandible dark brown, rest of mandible lighter than basal part (Figs 1, 5, 17). Head oval, 1.1–1.2 × as broad as high and 1.3–1.5 × as broad as mesosoma, with dense scale-like setae covering frons from base of mandible to slightly below eye height, scattered scale-like setae reaching top of eye and behind head; vertex with a few scattered scale-like setae; gena covered or with scattered scale-like setae; plumose setae long, dark and scattered over vertex and frons; vertex with spaced punctation (Fig. 17). POL 1.0–1.5 × as long as OOL, POL 1.7–2.3 × as long as LOL; eyes ovoid, separated by 0.9–1.0 × their height, malar space 0.03–0.06 × eye height. Scape with scale-like and scattered dark plumose setae, except ventrally glabrous; scape 1.8–2.1 × as long as broad and 2.0–2.6 × as long as pedicel; flagellomeres cylindrical, F1 0.7–0.9 × length of scape and 0.7–0.8 × length of F2, F2–F6 approximately same length, F7–F10 gradually decreasing in length, F11 elongated with rounded apex. REVIEW OF THE GENUS EOTILLA SCHUSTER, 1949 Zootaxa 3878 (1) © 2014 Magnolia Press · 3 FIGURES 1–8. Eotilla spp. 1, E. mickeli Schuster, ♂ (El Canelo, Santiago, Chile), habitus (lateral). 2, E. superba Brothers, ♂ (Posta de Hornillos, Jujuy, Argentina), habitus (lateral). 3, E. medanito sp. nov., ♂ (Saujil, Catamarca, Argentina), habitus (lateral). 4, E. schusteri sp. nov., ♂ (Udpinango, La Rioja, Argentina), habitus (lateral). 5, E. mickeli Schuster, ♂ (El Canelo, Santiago, Chile), habitus (dorsal). 6, E. superba Brothers, ♂ (Posta de Hornillos, Jujuy, Argentina), habitus (dorsal). 7, E. medanito sp. nov., ♂ (Saujil, Catamarca, Argentina), habitus (dorsal). 8, E. schusteri sp. nov., ♂ (Udpinango, La Rioja, Argentina), habitus (dorsal). 4 · Zootaxa 3878 (1) © 2014 Magnolia Press TORRENS ET AL. FIGURES 9–16. Eotilla spp. 9–10, E. mickeli Schuster, ♂ (Perales, Chile): 9, metasoma (dorsal); 10, metasoma (ventral). 11–12, E. superba Brothers, ♂ (Posta de Hornillos, Jujuy, Argentina): 11, metasoma (dorsal); 12, metasoma (ventral). 13–14, E. medanito sp. nov., ♂ (Saujil, Catamarca, Argentina): 13, metasoma (dorsal); 14, metasoma (ventral). 15–16, E. schusteri sp. nov., ♂ (Udpinango, La Rioja, Argentina): 15, metasoma (dorsal); 16, metasoma (ventral). Mesosoma elongate, 1.6–2.1 × as long as broad; punctation well marked, slightly contiguous on dorsum and more spaced on pleura and vertical surface of propodeum. Pronotum transverse, anteriorly forming a collar with white and long plumose setae, rest covered almost completely with scale-like and white plumose setae, plumose setae dark on dorsum. Mesonotum moderately punctate; with scattered scale-like and dark plumose setae, scalelike setae denser on posterior margin; tegula convex, smooth and basal half covered with scale-like setae; scutellum with scattered scale-like and dark plumose setae. Metanotum transverse, narrow, with scattered scale-like and a few REVIEW OF THE GENUS EOTILLA SCHUSTER, 1949 Zootaxa 3878 (1) © 2014 Magnolia Press · 5 dark plumose setae. Propodeum with contiguous punctation; with small dark plumose setae dorsally; vertical surface with scattered long white plumose setae, except central part smooth and without setae; rest of propodeum covered with scale-like and white plumose setae; a group of scale-like setae at insertion of hind coxa. Propleuron covered with plumose setae; mesopleuron convex, punctate except smooth anterodorsal to mid coxa, almost covered by scale-like and white plumose setae, but less dense medially and above mid coxa exposing the cuticle; metapleuron with spaced punctation, metepisternum with scattered long plumose setae and with scale-like setae above insertion of metacoxa, metepimeron covered with scale-like setae on upper half. Fore wing 2.8–3.1 × as long as broad, densely setose, hyaline, except a narrow small spot posterior to marginal cell; venation light brown, with coarse dark plumose setae. Legs slender; anterior surface of coxae, trochanters and femora almost covered by scale-like setae; plumose setae scattered across surfaces of legs, becoming denser where no scale-like setae; mid and hind tibial spurs white. Metasoma 2.4–2.6 × as long as broad, T1 1.2–1.7 × as long as wide and 0.6 × as wide as T2 (Fig. 9); terga with well-marked and contiguous punctation. T1 covered with erect white plumose setae and scattered dark plumose setae on dorsum, without or with a few scattered scale-like setae on central area, and dense scale-like setae along posterior margin; T2 entirely covered with erect dark plumose setae and decumbent dark simple setae and scattered white plumose setae on sides, dense scale-like setae along posterior margin; dark felt line 0.28–0.52 × lateral length of T2, its anterior extremity at 0.21–0.31 × lateral length of T2; T3–T5 with erect dark plumose setae and decumbent dark simple setae, scale-like setae on posterior margins; T6 with oblique dark brown coarse plumose setae without scale-like setae; T7 without a depression, and covered with dark brown coarse plumose setae, shorter than T6; sterna with sculpture and distribution of setae similar to corresponding terga, except erect plumose setae white (but becoming dark on posteriormost sterna), S1 without scale-like setae, S6 with scale-like setae on posterior margin (Fig. 10). Variation. The number of scale-like setae is variable, but the setation pattern is consistent. Discussion. Schuster (1949) based his description on seven males from Chile, and Mickel (1968) described the female based in a (misidentified) specimen from Argentina. There are many differences between species from Argentina and Chile, and it would be wrong to think that those are conspecific. We believe that Mickel’s female corresponds to a new species (E. schusteri) described below. Distribution. Chile: Atacama, Biobío, Copiapó, Coquimbo, Quillota, Maule, Santiago, Valparaíso (Fig. 38). Phenology. September–February. Material examined. Paratype of Eotilla mickeli, 1♂: CHILE: Concepción [36°48'47"S 73°02'54"W], 6/XII/ 1908, Herbst (1♂, ZMHB). Other material, 9♂: CHILE: Perales, II/1925, J.C. Brethes (no further data) (1♂, MACN); Coquimbo, Trapiche [30°38'1"S 71°19'50"W], 2/II/1972, Sielfeld (1♂, MNHNS); Valparaíso [33°4'47"S 71°34'49"W], 30/X/1972, Sielfeld (1♂, MNHNS); Olmué [32°59'45"S 71°11'29"W], 21/X/1917, Herbst (1♂, CAS); Santiago, Caleu [32°59'54"S 70°58'36"W], 6/XI/1988, M. Cerda (1♂, MNHNS); Curacaví [33°24'16"S 71° 7'28"W], 27/IX/1971, H. Sielfeld (1♂, MNHNS); El Alfalfal [33°25'25"S 70°45'11"W], 25/I/1968, J. Moroni (1♂, MNHNS); El Canelo [33º37'35''S 70º46'35''W], 26/XI/1951, L.E. Peña (1♂, CNC); Maule, Curicó, Huecahuecan [35°04'15"S 71°09'15"W], 22–28/I/1998, Ugarte (1♂, DJBC). Eotilla superba Brothers, 1974 (Figs 2, 6, 11, 12, 18, 22, 28, 32, 33) Eotilla superba Brothers, 1974: 361–363; holotype ♂, Argentina: Catamarca, Nacimientos de Abajo [27°09'54"S 66°43'56"W], examined. Diagnosis. Male. Head, mesosoma and metasoma black (Figs 2, 6). T2 with a group of white scale-like setae on central area (Fig. 11). T7 with an inverted-V-shaped depression medially. Posterior terga and sterna without dark, short and coarse setae. Female. General body color light brown to yellowish (Figs 22, 28). Posterior surface of propodeum with transverse striation. Head with dense scale-like setae covering frons from base of mandible to top of eye; gena without scale-like setae (Fig. 32). T2 and S2 with a group of scale-like setae on each side of posterior margin (Figs 22, 28). Metanotum with a few scattered scale-like setae, specially on sides dorsally (Fig. 28). Description. Male. Length 3.7–6.8 mm. General body color black; flagellomeres, tibiae and tarsomeres, and basal part of mandible dark brown, rest of mandible light brown; rest of antennae and legs black (Figs 2, 6). 6 · Zootaxa 3878 (1) © 2014 Magnolia Press TORRENS ET AL. FIGURES 17–21. Eotilla spp. 17, E. mickeli Schuster, ♂ (Perales, Chile), head (anterior). 18, E. superba Brothers, ♂ (Posta de Hornillos, Jujuy, Argentina), head (anterior). 19, E. schusteri sp. nov., ♂ (Udpinango, La Rioja, Argentina), head (anterior). 20, E. medanito sp. nov., ♂ (Saujil, Catamarca, Argentina), head (anterior). 21, E. schusteri sp. nov., ♂ (Udpinango, La Rioja, Argentina), genitalia (ventral; genital foramen projection indicated). REVIEW OF THE GENUS EOTILLA SCHUSTER, 1949 Zootaxa 3878 (1) © 2014 Magnolia Press · 7 FIGURES 22–31. Eotilla spp. 22, E. superba Brothers, ♀ (Posta de Hornillos, Jujuy, Argentina), habitus (lateral). 23, E. medanito sp. nov., ♀ (Udpinango, La Rioja, Argentina), habitus (lateral). 24, E. medanito sp. nov., ♀ (Saujil, Catamarca, Argentina), habitus (lateral). 25, E. medanito sp. nov., ♀ (Saujil, Catamarca, Argentina), habitus (dorsal). 26, E. schusteri sp. nov., ♀ (Udpinango, La Rioja, Argentina), habitus (lateral). 27, E. schusteri sp. nov., ♀ (Andalgalá, Catamarca, Argentina), habitus (lateral). 28, E. superba Brothers, ♀ (Posta de Hornillos, Jujuy, Argentina), habitus (dorsal). 29, E. medanito sp. nov., ♀ (Udpinango, La Rioja, Argentina), habitus (dorsal). 30, E. schusteri sp. nov., ♀ (Udpinango, La Rioja, Argentina), habitus (dorsal). 31, E. schusteri sp. nov., ♀ (Andalgalá, Catamarca, Argentina), habitus (dorsal). 8 · Zootaxa 3878 (1) © 2014 Magnolia Press TORRENS ET AL. FIGURES 32–37. Eotilla spp. 32–33, E. superba Brothers, ♀ (Posta de Hornillos, Jujuy, Argentina): 32, head (anterior); 33, mesosoma (lateral). 34–35, E. medanito sp. nov., ♀ (Saujil, Catamarca, Argentina): 34, head (anterior); 35, mesosoma (lateral). 36–37, E. schusteri sp. nov., ♀: 36, head (anterior) (Udpinango, La Rioja, Argentina); 37, mesosoma (lateral) (Andalgalá, Catamarca, Argentina). Head oval, 1.1–1.4 × as broad as high and 1.2–1.4 × as broad as mesosoma, with dense scale-like setae covering frons from base of mandible to slightly below eye height, a few scattered scale-like setae reaching top of eye and behind head; vertex without or with a few scattered scale-like setae; gena covered with scale-like setae; plumose setae long, dark and scattered over vertex and frons, almost reaching toruli (Fig. 18); vertex with spaced REVIEW OF THE GENUS EOTILLA SCHUSTER, 1949 Zootaxa 3878 (1) © 2014 Magnolia Press · 9 punctation. POL 1.5–2.3 × as long as OOL, POL 1.7–2.0 × as long as LOL; eyes ovoid, separated by 0.9–1.1 × their height, malar space 0.04–0.09 × eye height. Scape with scale-like and scattered dark plumose setae, except ventrally glabrous; scape 1.6–2.1 × as long as broad and 1.9–3.3 × as long as pedicel; flagellomeres cylindrical, F1 0.7–0.9 × length of scape and 0.7–0.8 × length of F2, F2–F6 approximately same length, F7–F10 gradually decreasing in length, F11 elongated with rounded apex. Mesosoma elongate, 1.5–2.0 × as long as broad; punctation well marked, spaced on dorsum and more contiguous on pleura and propodeum. Pronotum transverse, anteriorly forming a collar with small plumose setae, rest covered almost completely with scale-like and white plumose setae, plumose setae dark on dorsum. Mesonotum moderately punctate; with scattered scale-like and dark plumose setae, scale-like setae denser on posterior margin; tegula convex, smooth and basal half covered with scale-like setae; scutellum with well-scattered punctation except medially smooth and with scattered scale-like and dark plumose setae. Metanotum transverse, narrow, with scattered scale-like and white plumose setae; punctate except medially smooth. Propodeum with contiguous punctation; with small dark plumose setae dorsally; vertical surface with scattered long white plumose setae; rest of propodeum covered with scale-like and white plumose setae; a group of scale-like setae at insertion of hind coxa. Propleuron covered with plumose setae; mesopleuron convex, punctate except smooth anterodorsal to mid coxa, fairly densely covered by scale-like and white plumose setae, but less dense medially and above mid coxa exposing the cuticle; metapleuron with moderately spaced punctation but sparser anteroventrally, metepisternum covered by long plumose setae on central area and with scale-like setae above insertion of metacoxa, metepimeron covered with scale-like setae. Fore wing 2.8–3.4 × as long as broad, densely setose (Fig. 2), hyaline, except a narrow small darker spot apical to marginal cell; venation light brown, with coarse dark plumose setae. Legs slender; anterior surfaces of coxae, trochanters, femora and tibiae almost covered by scale-like setae; plumose setae scattered across surfaces of legs, becoming denser where no scale-like setae; mid and hind tibial spurs white. Metasoma 2.3–2.8 × as long as broad, T1 1.2–1.5 × as long as wide and 0.6–0.7 × as wide as T2 (Fig. 11); terga with well-marked punctation, slightly spaced on T1, remaining terga with punctation contiguous. T1 covered with erect white plumose setae, a few scattered scale-like setae on central area and dense scale-like setae along posterior margin; T2 with an oval group of few to many scale-like setae on central area, entirely covered with erect white to dark plumose setae and decumbent dark simple setae, dense scale-like setae along posterior margin; dark felt line 0.37–0.54 × lateral length of T2, its anterior extremity at 0.22–0.30 × lateral length of T2; T3–T5 with scattered erect white to dark plumose setae and decumbent dark simple setae, scale-like setae on posterior margins; T6 with scattered erect white to dark plumose setae, apical margin with oblique dark brown coarse plumose setae (different from those observed in E. mickeli) and a few scale-like setae laterally; T7 with a smooth inverted-V-shaped depression medially, with scattered small dark plumose to strong simple setae elsewhere; sterna with sculpture and distribution of setae similar to corresponding terga, except erect plumose setae white (but becoming dark on posteriormost sterna), S1 without or with only a few scale-like setae posterolaterally, S2 with a few to many scattered scale-like setae on sides and central area, S6 with only slender scale-like setae on posterior margin, S7 asetose and S8 with dark semi-erect plumose and decumbent strong simple setae (Fig. 12). Female (hitherto unknown). Length 3.2–4.0 mm. General body color light brown to yellowish except last segment of metasoma which is dark brown; scape, pedicel, inner surface of flagellomeres and legs light brown; basal ¾ of F1 black; rest of antenna, apical half of mandible, T6 and S6 dark brown (Figs 22, 28, 32, 33). Head 1.1–1.3 × as broad as high and 1.3–1.5 × as broad as mesosoma; with dense scale-like setae covering frons from base of mandible to top of eye; scattered dark plumose setae distributed throughout head, longer on clypeus; vertex with spaced punctation and coarse dark plumose setae; gena with scattered small dark plumose setae, without scale-like setae (Figs 32, 33). Eyes separated by 1.1–1.2 × their height, malar space 0.20–0.25 × eye height. Clypeus short and broad, slightly convex; mandible arched, simple, with small preapical denticle on inner edge, distance between inner denticle and apical tooth 0.2–0.3 × mandible length. Scape covered with scattered scale-like and plumose setae on dorsal and inner surfaces, with long plumose setae on ventral surface near insertion of pedicel, scape 2.0–2.6 × as long as broad and 1.3–1.6 × as long as pedicel; pedicel 2.0–2.7 × as long as broad and as long as F1; flagellomeres cylindrical, F1 0.6–0.8 × length of scape and 0.8–1.0 × as long as F2; remaining flagellomeres approximately same length except F6–F9 gradually decreasing in length, F10 elongated with rounded apex. 10 · Zootaxa 3878 (1) © 2014 Magnolia Press TORRENS ET AL. Mesosoma elongate, 1.6–2.0 × as long as broad (Fig. 28). Pronotum 1.3–1.6 × as broad as long (width taken across humeral tubercles), forming a collar anteriorly; humeral tubercle poorly developed; dorsum with wellmarked and contiguous punctation, with a dense transverse band of scale-like setae anteriorly and a few scattered scale-like setae on posterior margin, dark plumose setae throughout, setae longer laterad; lateral face smooth and without setae, except a few scale-like setae near insertion of fore coxa. Fused metanotum and propodeum dorsally with scattered and well-marked punctation, with a few scattered scale-like setae, especially on sides, and scattered dark plumose setae which longer laterad; posterior declivity of propodeum without setae and transversely striate, striations extending beyond limit of metapleura, sometimes reaching to level of spiracle. Propleuron smooth, with scattered dark plumose setae and a group of dark long plumose setae near insertion of fore coxa; mesopleuron smooth with a longitudinal carina reaching slightly beyond half of sclerite from ventral limit of pronotum, with scattered scale-like and small plumose setae, scale-like setae denser above mid coxa; metapleural-propodeal suture indistinguishable, without setae except a few scale-like setae near insertion of mid coxa and above hind coxa (Fig. 33). Legs slender; fore coxa with a group of dark long plumose setae on upper outer surface and a few scale-like and long plumose setae elsewhere; mid and hind coxae, trochanters, femora and tibiae covered with scale-like and plumose setae, except no scale-like setae on ventral surfaces. Metasoma 1.9–2.2 × as long as broad (Fig. 28), T1 0.93–0.96 × as long as wide and 0.52–0.60 × as wide as T2; with well-marked contiguous punctation on T1 and T2, except central area of vertical surface of T1 smooth; T3–T5 with punctation less marked and dispersed; T6 completely alutaceous. T1 with dense group of scale-like setae laterally on dorsal surface, scattered dark long plumose setae except medially on vertical surface; T2 with dense group of scale-like setae posterolaterally, with dark plumose setae across surface, dark felt line 0.14–0.17× lateral length of T2, its anterior extremity 0.24–0.26 × lateral length of T2; T3 with dark plumose setae; T4–T5 with scattered dark plumose setae on posterior margin; T6 without setae. Sterna with sculpture and distribution of setae similar to that of corresponding terga, except S2 with a few scale-like setae on each side of posterior margin, and S6 with latero-posterior margin with distinct denticles. Variation. Males. In some specimens the coloration of the metasoma and/or legs, particularly the tibiae and tarsomeres, is lighter. The number of scale-like setae is variable, specially on T1, T2 and S2; but the setation pattern is rather consistent. Females. In some specimens the coloration of the legs is darker, particularly the fore and mid coxae, femora and tibiae, and the metasoma a little lighter than the rest of the body. The number of scale-like setae is variable, but the setation pattern is consistent. In some specimens the striation of the propodeum is weak, appearing smooth. Discussion. The association between males and females is very difficult because of extreme sexual dimorphism. However, several specimens of both sexes were collected in the same place and on the same day, in addition to being the only species found at that locality, so that they are considered conspecific. Distribution. Argentina: Catamarca, Jujuy, La Rioja, Salta (Fig. 38). Phenology. September–March. Material examined. Holotype of Eotilla superba, ♂ : ARGENTINA: Catamarca, Los Nacimientos de Abajo [27°10'42"S 66°43'34"W], 2060 m, 16–31/XII/1968, Willink, Terán and Stange, MT (IFML). Paratypes, 4♂: ARGENTINA: Salta, Yacochuya (Cafayate) [26°2'16"S 66°1'29"W], 1950 m, 1–15/IX/1968, Willink, Terán and Stange, MT (2♂, IFML); same location, 16–30/IX/1968, Willink, Terán and Stange, MT (1♂, DJBC); Salta, Tacuil [25°35'15"S 66°26'23"W], 7/XII/1968, Willink, Stange (1♂, DJBC). Other material, 66♂ and 9♀: Catamarca, 10 km S of Cortaderas 27º37'57''S 68º14'52''W, 3923 m, 18/XII/2012, J. Torréns and P. Fidalgo, YPT (1♂, IFML); Jujuy, Ruta 9, Km 1762, ca Posta de Hornillos 23°39'47"S 65°26'13"W, 2390 m, 2–4/IX/2009, P. Fidalgo, YPT (12 ♂, 1♀, MACN); same location, 18–20/I/2012, J. Torréns and P. Fidalgo, YPT (16♂, 6♀, IFML); Ruta 52, Km 17, Puerta de Lipán 23°40'01"S 65°34'46"W, 2954 m, 10–11/X/09, P. Fidalgo, YPT (9♂, IADIZA); same location, 18–20/I/2012, J. Torréns and P. Fidalgo, YPT (1♀, DJBC); Ruta 52, Km 18, Puerta de Lipán 23°40'1"S 65°35'11"W, 3008 m, 10–11/X/09, P. Fidalgo, YPT (10♂, DJBC; 10♂, MNHNS); same location, 18–20/I/2012, J. Torréns and P. Fidalgo, YPT (2♂, 1♀, MNHNS); Quera 23°5'58"S 65°46'11"W, 5–6/III/2013, 3500 m, J. Torréns and P. Fidalgo, YPT (1♂, IFML); La Rioja, El Carrizal, 28°54'35"S 66°39'26"W, 16–18/XI/09, A. Aranda, pit-fall (1♂, MACN); La Puerta, 28°49'39"S 66°39'20"W, 29/XI/09, Torréns and Fidalgo, YPT (2♂, MACN); Qda. Santo Domingo 28°33'18"S 68°44'46"W, 2900 m, 02/XI/2009, J. Torréns, YPT (2♂, IFML). REVIEW OF THE GENUS EOTILLA SCHUSTER, 1949 Zootaxa 3878 (1) © 2014 Magnolia Press · 11 FIGURE 38. Distribution of species of Eotilla in Argentina and Chile. 12 · Zootaxa 3878 (1) © 2014 Magnolia Press TORRENS ET AL. Eotilla medanito Torréns, Fidalgo, Roig-Alsina & Brothers, sp. nov. (Figs 3, 7, 13, 14, 20, 23–25, 29, 34, 35) Diagnosis. Male. Head and mesosoma black (Figs 3, 7), metasoma entirely orange but apical terga darkened (Figs 13, 14). T2 with a group of scale-like setae on central area. Posterior terga and sterna without dark, short and coarse setae. T7 with an inverted-V-shaped depression medially. Female. General body color light brown to reddish, sometimes pleura, propodeum, legs and last two or three segments of metasoma with dark brown area (Figs 23–25, 29). All terga and sterna, except T1, without scale-like setae (Figs 23, 25, 29). Posterior surface of propodeum with striation, especially well marked on sides. Description. Male. Length 4.3–4.7 mm. Head and mesosoma black, metasoma orange. Scape, pedicel, flagellomeres except outer surface, coxae, fore and mid femora and tibia dark brown; rest of legs and antennae light brown. (Figs 3, 7). Head oval, 1.1–1.3 × as broad as high and 1.2–1.4 × as broad as mesosoma, with dense scale-like setae covering entire head, except around ocelli; gena covered with scale-like setae; plumose setae long, white and scattered over entire head, including vertex and occiput; vertex smooth (Fig. 20). POL 1.7–1.9 × as long as OOL, POL 1.6–2.1 × as long as LOL; eyes ovoid, separated by 1.0–1.1 × their height, malar space 0.05–0.13 × eye height. Scape with scale-like and white plumose setae covering almost entire surface except longitudinal carina ventrally; scape 1.8–1.9 × as long as broad and 1.9–2.6 × as long as pedicel; flagellomeres cylindrical, F1 0.8–0.9 × length of scape and 0.7–0.8 × length of F2, flagellomeres F2–F4 approximately same length, rest of flagellomeres gradually decreasing in length, F11 elongated with rounded apex. Mesosoma elongate, 1.6–1.9 × as long as broad (Fig. 7); punctation well marked, spaced on dorsum and more contiguous on pleura and propodeum. Pronotum transverse, anteriorly forming a collar with small plumose setae, rest covered completely with scale-like setae and scattered white plumose setae. Mesonotum moderately punctuate; with scattered scale-like and white plumose setae, scale-like setae denser on posterior margin; tegula convex, smooth and covered with scale-like setae; scutellum with scale-like and white plumose setae covering the entire surface. Metanotum transverse, narrow, with scale-like and white plumose setae. Propodeum with contiguous punctation becoming spaced on vertical surface; with small dark plumose setae dorsally; vertical surface with a few scale-like setae and with scattered long white plumose setae; rest of propodeum covered with scale-like and white plumose setae. Propleuron covered almost completely with scale-like setae and long white plumose setae; mesopleuron convex, densely covered by scale-like and plumose setae; metapleuron with spaced punctation, metepisternum covered by long plumose setae on central area and with scale-like setae at insertion of metacoxa, metepimeron covered with scale-like setae. Fore wing 3.2–3.4 × as long as broad, moderately setose (Fig. 3), hyaline; venation light brown, with coarse dark plumose setae on costal and subcostal veins. Legs slender; anterior surface of coxae, trochanters, femora and tibiae covered by scale-like setae; plumose setae scattered across surfaces of legs, becoming denser where no scale-like setae; mid and hind tibial spurs white. Metasoma 2.4–2.6 × as long as broad, T1 1.2–1.5 × as long as wide and 0.6 × as wide as T2 (Fig. 13); terga with well-marked contiguous punctation. T1 covered with scale-like setae, except central area dorsally with plumose setae; T2 with a group of scale-like setae on antero-central area and posterior margin, elsewhere with scattered white plumose setae and decumbent dark simple setae; white felt line 0.38–0.50 × lateral length of T2, its anterior extremity at 0.17–0.28 × lateral length of T2; T3 with white plumose setae and decumbent dark simple setae, scale-like setae on posterior margin; T4–T6 covered by scale-like setae and white plumose setae; T6 with scattered dark plumose setae and oblique dark brown coarse plumose setae on central area of apical margin; T7 with a smooth inverted-V-shaped depression medially, scale-like setae on both sides of depression anteriorly, and scattered dark brown plumose setae; sterna with sculpture and distribution of setae similar to corresponding terga, except S1 without or with only a few scale-like setae posterolaterally, S2 with several scattered scale-like setae covering whole surface, S7 asetose and S8 with dark semi-erect plumose and decumbent strong simple setae and a few scale-like setae (Fig. 14). Female. Length 2.7–3.7 mm. General body color light brown to reddish (Figs 23, 29), sometimes pleura, propodeum and last two or three segments of metasoma with dark brown patch (Figs 24, 25); scape, pedicel and inner surface of flagellomeres light brown, elsewhere flagellomeres dark brown, basal ¾ of F1 black; apical half of mandible, coxae and femora darker than rest of body (Figs 23–25, 29, 34, 35). REVIEW OF THE GENUS EOTILLA SCHUSTER, 1949 Zootaxa 3878 (1) © 2014 Magnolia Press · 13 Head 1.1–1.3 × as broad as high and 1.3–1.4 × as broad as mesosoma; with dense scale-like setae covering entire head; scattered dark plumose setae distributed throughout head, longer on clypeus; vertex with spaced punctation and white plumose setae near occiput; gena covered with scale-like setae and scattered dark plumose setae (Figs 34, 35). Eyes separated by 1.1–1.3 × their height, malar space 0.24–0.33 × eye height. Clypeus short and broad, slightly convex; mandible arched, simple, with small preapical denticle on inner edge, distance from inner denticle to apical denticle 0.22 × mandible length. Scape covered with scale-like and plumose setae on dorsal and inner surfaces, with long plumose setae on ventral surface near insertion of pedicel, scape 2.0–2.5 × as long as broad and 1.4–1.7 × as long as pedicel; pedicel 1.8–2.3 × as long as broad; flagellomeres cylindrical, F1 0.5–0.7 × length of scape and 1.0 × as long as F2; remaining flagellomeres approximately same length except F6–F9 gradually decreasing in length, F10 elongated with rounded apex. Mesosoma elongate, 1.5–1.9 × as long as broad (Figs 25, 29). Pronotum 1.4–1.7 × as broad (across humeral tubercles) as long (excluding anterior collar); humeral tubercle poorly developed; dorsum with well-marked and contiguous punctation anteriorly and spaced punctation on central area, covered with scale-like setae and scattered dark plumose setae throughout, setae longer laterad; lateral face covered with scale-like setae. Fused metanotum and propodeum dorsally covered with scale-like setae and scattered dark plumose setae throughout, plumose setae longer laterad; posterior declivity of propodeum smooth on upper half and striate on lower half especially well marked on sides, with scattered small plumose setae and a few scale-like setae laterad, reaching to insertion of hind coxa. Propleuron smooth and without setae, except a group of dark long plumose setae near insertion of fore coxa; mesopleuron weakly rugose to smooth with a longitudinal carina reaching to half of sclerite from ventral limit of pronotum, covered with scale-like setae, denser above mid coxa and long plumose setae at insertion of mid coxa; metapleural-propodeal suture indistinguishable, with scattered plumose setae and a longitudinal band of scale-like setae above hind coxa continuous with that on mesopleuron, reaching propodeal foramen and connected with scalelike setae of propodeum (Fig. 35). Legs slender; fore coxa transversely striate, with a group of dark long plumose setae on upper outer surface and distributed at random near insertion of trochanter and on inner surface and few small scale-like setae on outer and posterior surfaces and near insertion of trochanter; mid and hind coxae, trochanters, femora and tibiae covered with scale-like and plumose setae, except no scale-like setae on ventral surfaces. Metasoma 2.0–2.4 × as long as broad (Figs 25, 29); T1 0.84–0.93 × as long as wide and 0.60–0.70 × as wide as T2; with well-marked contiguous punctation on T1, except central area of vertical surface of T1 smooth; T2–T5 with punctation less marked and dispersed; T6 completely alutaceous. T1 covered with scale-like and scattered dark long plumose setae, except vertical surface without scale-like setae and with a few white long plumose setae; T2 with dark plumose setae across surface, dark felt line 0.17–0.20× lateral length of T2, its anterior extremity 0.20–0.26 × lateral length of T2; T3–T5 with scattered dark plumose setae; T6 without setae. Sterna with sculpture and distribution of setae similar to that of corresponding terga, except S1 with a few scattered plumose setae and without scale-like setae, and S6 with latero-posterior margin with distinct denticles. Variation. Males. The antennae and legs are sometimes darker, and the femora may be almost completely dark brown; the predominance of scale-like setae on the mesosoma is higher in some specimens; on T2 the scale-like setae may cover almost the entire dorsal region. Females. The general body color varies among individuals, being slightly darker in some specimens, especially from Saujil (Figs 24, 25), however the general color pattern is retained. Some specimens have fewer scale-like setae on the dorsum of the pronotum. In some specimens the upper half of the propodeum is rugose, and the striation laterally reaching to the dorsal surface. Discussion. As for E. superba, several specimens of both sexes were collected at the same place and on the same day, in addition to being the only species found there, so that they are considered conspecific. Etymology. The name “medanito” comes from the Spanish diminutive of “médano” and refers to the dune environment where this species lives. It is a noun in apposition. Distribution. Argentina: Catamarca, La Rioja, Santa Cruz (Fig. 38). Phenology. November–May. Material examined. Holotype ♂ : ARGENTINA: Catamarca, 3.5 km N de Saujil, Ruta 34 27°32'06"S 67°33'23"W, 1650 m, 4–6/XII/2011, P. Fidalgo, YPT (MACN). Paratypes, 5♂ and 23♀: Catamarca, 3.5 km N de Saujil, Ruta 34 27°32'06"S 67°33'23"W, 1650 m, 4–6/XII/2011, P. Fidalgo, YPT (1♂, IFML); same location, 8/II/ 2006, P. Fidalgo and P. Diez, YPT (3♀, IFML); same location, 13–14/xi/2013, Fidalgo and Torréns (11♀, MACN); 14 · Zootaxa 3878 (1) © 2014 Magnolia Press TORRENS ET AL. same location, 1/v/2014, P. Fidalgo (1♂, 2♀, DJBC); La Rioja, sur de Udpinango 28°42'7"S 66°47'51"W, 991 m, II/2006, P. Fidalgo, G. Fidalgo, P. Diez and P. Torréns, YPT (4♀, IFML); same location, 25/II–4/III/2006, Fidalgo, Diez and Torréns, pit-fall (1♀, DJBC); same location, 20/III/2006, Fidalgo, Diez and Torréns, pit-fall (1♀, DJBC); same location, 8–28/IV/2006, pit-fall (1♀, DJBC); same location, I/2007, J. Torréns and C. Nieto, YPT (2♂, MACN); same location, 2–9/XI/2011, J. Torréns and P. Fidalgo, YPT (1♂, 1♀, IFML); Santa Cruz, 2 km S of Caleta Olivia [46°29'36"S 67°32'55"W], 12/XII/1966, 10 m, E.I. Schlinger and M. Irwin (1♂, CAS). Eotilla schusteri Torréns, Fidalgo, Roig-Alsina & Brothers, sp. nov. (Figs 4, 8, 15, 16, 19, 21, 26, 27, 30, 31, 36, 37) Eotilla mickeli female, Mickel 1968: 234–236 (misidentification). Diagnosis. Male. Head, mesosoma and metasoma dark brown to black (Figs 4, 8). T1, T2 and S2 with abundant scale-like setae on all surfaces (Figs 15, 16). Female. Head and pronotum brownish to reddish; metasoma entirely dark brown to black or T1 and S1 brownish to reddish and remainder darker (Figs 26, 27, 30, 31). T2 with abudant scale-like setae, except on central area (Figs 30, 31). Posterior surface of propodeum with striation, especially well marked on sides. Description. Male. Length 4.0–5.7 mm. General body color black. Flagellomeres, femora, tibiae and tarsomeres, and apical part of mandible dark brown; scape and pedicel dark brown to black; rest of mandible light brown (Figs 4, 8). Head oval, 1.0–1.2 × as broad as high and 1.2–1.4 × as broad as mesosoma, with dense scale-like setae covering frons from base of mandible to top of eye, a few scattered scale-like setae on vertex and behind head; gena covered with scale-like setae; plumose setae long, white and scattered over vertex and frons and with a few dark plumose setae on vertex (Fig. 19); vertex with spaced punctation. POL 1.8–2.1 × as long as OOL, POL 1.7–2.2 × as long as LOL; eyes ovoid, separated by 1.0–1.1 × their height, malar space 0.04–0.09 × eye height. Scape with scale-like and scattered white plumose setae, except ventrally glabrous; scape 1.6–2.1 × as long as broad and 2.0–2.8 × as long as pedicel; flagellomeres cylindrical, F1 0.8 × length of scape and 0.6–0.8 × length of F2, F2–F6 approximately same length, F7–F10 gradually decreasing in length, F11 elongated with rounded apex. Mesosoma elongate, 1.6–1.9 × as long as broad; punctation well marked and contiguous, spaced on dorsum of mesonotum and scutellum. Pronotum transverse, anteriorly forming a collar with white scattered plumose setae, rest covered completely with scale-like and white plumose setae and a few dark plumose setae. Mesonotum moderately punctate; with scattered scale-like, white plumose setae and a few dark plumose setae, scale-like setae denser on posterior half; tegula convex, smooth and covered with scale-like setae; scutellum with scattered punctation and with scattered scale-like and white plumose setae and a few dark plumose setae. Metanotum transverse, narrow, almost covered with scale-like and white plumose setae; punctate. Propodeum with contiguous punctation; with small dark plumose setae dorsally; vertical surface with scattered long white plumose setae; rest of propodeum covered with scale-like and white plumose setae. Propleuron covered with long scale-like and plumose setae; mesopleuron convex, punctate, fairly densely covered by scale-like and white plumose setae; metapleuron with moderately spaced punctation but sparser anteroventrally, metepisternum covered by long plumose setae on central area and with scale-like setae around central area and above insertion of metacoxa, metepimeron covered with scale-like setae. Fore wing 2.9–3.4 × as long as broad, densely setose (Fig. 4), hyaline; venation light brown, with coarse dark plumose setae. Legs slender; anterior surfaces of coxae, trochanters, femora and tibiae covered by scale-like setae; plumose setae scattered across surfaces of legs, becoming denser where no scale-like setae; mid and hind tibial spurs white. Metasoma 2.3–2.8 × as long as broad, T1 1.1–1.4 × as long as wide and 0.6–0.7 × as wide as T2 (Fig. 15); terga with well-marked punctation, slightly spaced on T1, remaining terga with punctation contiguous. T1 covered with erect white plumose setae, with abundant scale-like setae, less dense on central area on dorsum, without scale-like setae on vertical surface; T2 with a dense group of scale-like setae on anterior margin and reaching to central area, entirely covered with erect white to dark plumose setae and decumbent dark simple setae, dense scale-like setae along posterior margin; dark felt line 0.45–0.57 × lateral length of T2, its anterior extremity at 0.17–0.22 × lateral REVIEW OF THE GENUS EOTILLA SCHUSTER, 1949 Zootaxa 3878 (1) © 2014 Magnolia Press · 15 length of T2; T3–T4 with erect white to dark plumose setae and decumbent dark simple setae, scale-like setae on posterior margins; T5–T6 with scattered scale-like setae and erect white to dark plumose setae, apical margin with oblique dark brown coarse plumose setae (different from those observed in E. mickeli); T7 with a smooth invertedV-shaped depression medially, with scattered small dark plumose to strong simple setae elsewhere; sterna with sculpture and distribution of setae similar to corresponding terga, S1 without or with only a few scale-like setae posterolaterally, S2 almost covered with scattered scale-like setae, S7–S8 with dark semi-erect plumose and decumbent strong simple setae (Fig. 16). Female. Length 2.4–4.0 mm. Head, scape, pedicel, apical part of F1 and inner surfaces of flagellomeres, mesosoma, legs, T1 and S1 brownish to reddish; rest of flagellomeres except basal 3/4 of F1 dark brown; rest of F1 and metasoma brownish to blackish (Figs 26, 27). Some specimens with head and pronotum brownish to reddish and rest of mesosoma and metasoma dark brown to black (Figs 27, 31). Head 1.1–1.3 × as broad as high and 1.3–1.4 × as broad as mesosoma; with dense scale-like setae covering frons from base of mandible to top of eye; scattered dark plumose setae distributed throughout head, longer on clypeus; vertex with spaced punctation but smooth medially, with a few scale-like setae and coarse dark plumose setae; gena with scattered scale-like setae covering all surface, without plumose setae (Fig. 36). Eyes separated by 1.0–1.2 × their height; malar space 0.16–0.30 × eye height. Clypeus short and broad, slightly convex; mandible arched, simple, with small preapical denticle on inner edge, distance from inner denticle to apical denticle 0.14–0.27 × mandible length. Scape covered with scale-like setae on dorsal and inner surfaces, with a few short plumose setae near insertion of pedicel and long plumose setae on ventral surface, scape 2.4–3.1 × as long as broad and 1.3–2.2 × as long as pedicel; pedicel 1.8–2.2 × as long as broad; flagellomeres cylindrical, F1 0.5–0.7 × length of scape and as long as F2; remaining flagellomeres approximately same length, except F5–F9 gradually decreasing in length, F10 elongated with rounded apex. Mesosoma elongate, 1.8–2.1 × as long as broad (Figs 30, 31). Pronotum 1.1–1.6 × as broad as long (across humeral tubercles) as long (excluding anterior collar); humeral tubercle poorly developed; dorsum with wellmarked and very spaced punctation, with scale-like setae covering entire surface or restricted to a transverse band anteriorly, dark plumose setae throughout, setae longer laterad; lateral surface punctate or smooth, with scale-like setae covering entire surface or scattered and denser above fore coxa. Fused metanotum and propodeum dorsally with spaced and well-marked punctation becoming contiguous on sides, with scale-like setae covering dorsal surface and scattered dark plumose setae throughout, setae longer laterad; posterior declivity of propodeum without setae and transversely striate; lateral face smooth on upper half and striate on lower half, especially well marked on sides. Propleuron smooth, with scattered scale-like setae and a group of white or dark long plumose setae near insertion of fore coxa; mesopleuron smooth with a longitudinal carina restricted to half of sclerite from ventral limit of pronotum, with dense or scattered scale-like setae denser above mid coxa; metapleural-propodeal suture indistinguishable, with scattered scale-like setae or with scale-like setae only near insertion of mid coxa and above hind coxa (Fig. 37). Legs slender; fore coxa with a group of white or dark long plumose setae on upper outer surface and distributed at random in all surfaces, with scattered scale-like and dark long plumose setae elsewhere; mid and hind coxae, trochanters, femora and tibiae covered with scale-like and plumose setae, except no scale-like setae on ventral surfaces. Metasoma 2.1–2.5 × as long as broad (Figs 30, 31); T1 0.92–1.08 × as long as wide and 0.65–0.75 × as wide as T2; with well-marked contiguous punctation on T1 and T2, except vertical surface of T1 smooth; T3–T5 with punctation less marked and dispersed; T6 completely alutaceous. T1 with scale-like setae except central area on dorsal surface, scattered dark long plumose setae except with white long plumose setae on vertical surface; T2 with scale-like setae anteriorly and laterally, denser postero-laterally, with dark plumose setae across surface, dark felt line 0.11–0.20× lateral length of T2, its anterior extremity 0.24–0.32 × lateral length of T2; T3 with a few scale-like setae posterolaterally or without such setae; T3–T5 with dark plumose setae; T6 without setae. Sterna with sculpture and distribution of setae similar to that of corresponding terga, except S1 and S2 with a few scale-like setae, and S6 with latero-posterior margin with distinct denticles. Variation. Males. In some specimens the coloration of the metasoma and legs, particularly the tibiae and tarsomeres, is lighter. The number of scale-like setae is variable, specially on T1 and T2; but the setation pattern is fairly consistent. Females. The coloration of the mesosoma and metasoma is highly variable; there are specimens with the 16 · Zootaxa 3878 (1) © 2014 Magnolia Press TORRENS ET AL. pronotum lighter than the rest of the mesosoma and metasoma, and others with the mesosoma and T1 lighter than the rest of the metasoma; also, in some specimens the coloration of the head, femora, tibiae, pleura and propodeum is darker. One specimen from Neuquén (Las Lajas) has a particular coloration of the metasoma, with the vertical surface of T1, the anterior half of T2 and S2 and the last three terga of the metasoma dark brown and the rest lighter, but the morphological characters and disposition of setae correspond to this species. The pronotum has a few scale-like setae on the central area of the dorsum or none; otherwise the scale-like setae on the mesosoma and metasoma show variation in density but not in disposition. Discussion. As discussed above for E. superba, all females were collected at the same locality as males, so they are considered conspecific. Mickel (1968) described a female specimen from Argentina and attributed it to E. mickeli Schuster (from Chile); however, the notable differences between species from Argentina and Chile, and the remarkable similarity of that specimen with the description above, suggests that it was misidentified and is actually this species. Etymology. Named in honor of the describer of the genus Eotilla (and Prototilla), Rudolf M. Schuster. Distribution. Argentina: Catamarca, La Rioja, Neuquén (Fig. 38). Phenology. September, December–April. Material examined. Holotype ♂: ARGENTINA: La Rioja, Santa Teresita [28°35'57"S 66°33'32"W], 690 m, 8–28/IV/2006, Porter, Torréns y Fidalgo, MT (1♂, MACN). Paratypes, 9♂ and 8♀: Catamarca, Andalgalá [27°34'60"S 66°21'2"W], 12/XII/1973, JH Hunt #1495, det. as E. mickeli by Snelling (1♂, LACM); Andalgalá, Villavil [27°34'36"S 66°15'02"W], 30/XII/1973, FE Enders, JHHunt#1504 (2♀ LACM, 1♀ DJBC); same data but JHH#1502 (1♀ LACM); El Pucará empalme [27°42'17"S 66°00'36"W], 7/I/1974, FE Enders, #JHH1499 det. as E. mickeli by Snelling (1♀, LACM); La Rioja, Udpinango, 5 km S de Udpinango 28°43'16"S 66°47'34"W, 1011 m, 16–25/III/2005, P. Fidalgo, G. Fidalgo and J. Torréns, YPT (1♀, DJBC); same location, II/2006, Fidalgo, Diez and Torréns, YPT (1♀, MACN); same location, 8–28/IV/2006, pit-fall (1♀, IFML); same location, 26/I/2007, Torréns, Fidalgo and Diez, YPT (5♂, MACN); same location, I/2007, J. Torréns and C. Nieto, YPT (1♂, DJBC); same location, 26/II/2007, Fidalgo, Diez and Torréns, YPT (1♂, IFML); same location, 2–9/XI/2011, J. Torréns and P. Fidalgo, YPT (1♀, IFML); La Puerta, 28°50'13"S 66°39'29"W, 16–18/XI/09, A. Aranda, pit-fall (1♀, MACN); 7 km E de Anillaco [28°46'29"S 66°51'53"W], IX–X/2013, A. Aranda, pit-fall (1♂, IFML); Neuquén, Covunco [38°46'1"S 70°3'18"W], 18/I/1949 (Allotype, 1♀, IFML); 20 km Las Lajas, ANP Cuchillo Curá [38°36'40"S 70°23'54"W], 20/I/1992, J. Sganga (1♀, IFML) Acknowledgements This work was made possible by funds provided by Agencia Nacional de Promoción Científica y Tecnológica, PICT 2007-1238, Préstamo BID. The University of KwaZulu-Natal Research Office provided funding to DJB. Thanks also go to James Pitts and Emily Sadler for their contributions and suggestions to this manuscript, and to Mario Elgueta (MNHNS) and to the curators of other collections named above for access to specimens in their care. 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