Revision of South American stiletto fly genus Argolepida Metz & Irwin (Diptera: Therevidae: Therevinae) Author Irwin, Michael E. Emeritus, University of Illinois, Urbana-Champaign, Illinois, USA, and University of Arizona, Tucson, USA. Author Winterton, Shaun L. California State Collection of Arthropods, California Department of Food & Agriculture, Sacramento, California, USA. text Zootaxa 2021 2021-11-16 5068 2 151 185 journal article 3514 10.11646/zootaxa.5068.2.1 fcf4d8f9-10b7-4c73-836d-ebfcfb7bbfeb 1175-5326 5704221 B56E3F96-D892-4E14-8008-24CA0F58A8FF Argolepida schlingeri sp. n. Zoobank: urn:lsid:zoobank.org:act: D137E223-593B-4C61-B996-10447536E588 ( Figs 25–28 ; 32M, N ; 34C ; 36G ; 37 ) FIGURE 25 . Argolepida schlingeri sp. n. : male, oblique view. Diagnosis . Male frons with small and elongate medial glabrous area, female with ‘shield’-like glabrous area across frons; wing hyaline; abdominal tergites 1–6 with white scale-like adpressed setae; femora mostly brown. Description . Body length: 5.5–7.0 mm. Head with male frons flat, uniform greyish silver pubescence with small elongate glabrous area centrally ( Fig. 32M ), female frons slightly raised, light brown dorsally, greyish silver ventrally, ‘shield’-like domed glabrous area medially ( Fig. 32N ), few short pale setae below ocellar tubercle; postocular setae pale, occiput pubescence grey, white scale-like setae abundant medially; antennal scape and flagellum brown, overlain with grey pubescence. Thorax with scutal pubescence dark brown, short erect filiform setae admixed with adpressed white scale-like setae, denser anteriorly; pleuron with dense silver-grey pubescence, extensive semi-erect white scale-like setae, katatergite with admixed strong filiform and scale-like setae; coxae dark, overlain with silvergrey pubescence, setae white, mid coxa without setae on posterior surface; femora dark grey-brown, apices yellow, densely covered with white scale-like adpressed setae; tibiae yellow, dark grey-brown apically; tarsi brown, yellow basally; wing hyaline, infuscate along wing veins, basally in radial cells; venation pale; haltere stem dark with knob pale. Abdomen base colour mostly dark brown, adpressed white scale-like setae on segments 1–6, black on rest remaining segments; terminalia brown. Male and female genitalia as per genus description except ejaculatory apodeme slightly spatulate anteriorly, lateral ejaculatory apodeme relatively small. FIGURE 26 . Argolepida schlingeri sp. n. : male, lateral view. FIGURE 27 . Argolepida schlingeri sp. n. : female, oblique view. Etymology . We are honoured to name this species after the Late Dr Evert I. Schlinger, mentor and collector of many specimens belonging to the genus Argolepida . Comments . Argolepida schlingeri sp. n. is extensively covered in adpressed scale-like setae and is similar to A. patagonia sp. n. , differing mostly in having hyaline wings and the shield-like shape of the female frontal glabrous patch. This species is distributed along the Western slopes of the Andes in Northern Argentina ; it overlaps in distribution with P. rivulosa and P. telteca sp. n. Type material . Holotype male, ARGENTINA : Tucumán Province : Casa del Campo , Hwy 40 at km 992 [ - 26.5473 , -66.0230 ], 5,920 ft. , white sand area, 18.X.1997 , M.E. Irwin , F.D. Parker , S. Roig (MEI107007; MNBR ) . Paratypes : ARGENTINA : Tucumán Province : 23 males , 6 females , same data as holotype (MEI106546–52, 106999–7006, 107008, 106991–6, 106998–9, 107014–9; CSCA , CASC , UCCS ) . Other material examined. ARGENTINA : Catamarca Province : 10 males , 28 km SE. Tinogasta [ -28.2443 , -67.4587 ], 1100 m , Malaise in dunes, 15–19.X.1997 , M.E. Irwin , F.D. Parker , S. Roig (MEI106481–90; CSCA ) ; 9 females , Los Corales , 46 km S. Santa Maria [approximated as -26.9923 , -66.1617 ], 1100 m , Malaise in white dunes, 17–19.X.1997 , M.E. Irwin , F.D. Parker , S. Roig (MEI106494–5, 106498–500, 107970–1; CSCA ) ; 5 females , San Fernando, N . Belen [approximated as -27.3305 , -66.8975 ], 1650 m , hand netted in large wash, 8.IX.1999 , M.E. Irwin , F.D. Parker (MEI134839–43; CSCA ) ; 6 females , 6 km N. Santa Maria [ -26.6654 , -66.0214 ], 1900 m , 19.II.1967 , sand dune, M.E. Irwin (MEI00006–10, 00062; CSCA ) . La Rioja Province : 7 males , 2 km N. Villa Castelli [ -28.9977 , -68.2027 ], 4240 ft. , Malaise , 14.X.1997 , M.E. Irwin , F.D. Parker , S. Roig (MEI107010–13, 134849, 106797–8) ; 17 males , Termas de Santa Teresita [ -28.5971 , -66.5493 ], 610 m , Malaise in yard, 14.IX.1999 , M.E. Irwin , F.D. Parker (MEI134844, 134886–7, 134832–5, 134837, 134852–9, 134894–5; CSCA ) . Salta Province : 6 males , 1 female , 5 km NE. Cafayate [ -26.0496 , -65.8996 ], 1620 m , 11.X.2003 , S.M. Blank , C. Kutzscher (MEI157409–10, 157412–15; CSCA ) .