Three new species of Retusigaster Dangerfield, Austin & Whitfield, 1999 (Hymenoptera, Braconidae, Cardiochilinae) with an illustrated key to the New World species Author Kang, Ilgoo https://orcid.org/0000-0002-8501-1758 Department of Entomology, Louisiana State University Agricultural Center, 404 Life Sciences Building, Baton Rouge, LA, 70803 USA ikang1@lsu.edu text ZooKeys 2022 2022-04-04 1092 47 62 http://dx.doi.org/10.3897/zookeys.1092.80560 journal article http://dx.doi.org/10.3897/zookeys.1092.80560 1313-2970-1092-47 5D61CD92C4DA46F7A048ECA22E663F33 9A65E5C3830E51ECB02EFD847F833EB9 Retusigaster vanduzeei Kang sp. nov. Fig. 5A-H Material examined. Holotype USA • ♀ ; Nixon , Washoe County , Nevada ; 30.vi.1927 ; EP Van Duzee . Holotype will be deposited in CAS. Diagnosis. Retusigaster vanduzeei sp. nov. is most similar to R. noguerai Mercado. Using the following characters, the members of R. vanduzeei sp. nov. can be distinguished from other members the genus: inner and outer orbits orange (Fig. 5A-E ); fore wing entirely infuscate (Fig. 5F ); precoxal sulcus crenulate nearly reaching posterior margin (Fig. 5G ); propodeal areola oval (Fig. 5H ); metasoma entirely dark (Fig. 5B ); T1 antero-laterally crenulate and postero-laterally slightly rugulose; T2 ~ 0.27 x longer than its posterior width (Fig. 5B, H ). Figure 5. Retusigaster vanduzeei sp. nov. A lateral habitus B dorsal habitus C anterior head D dorsal head E lateral head F wings G mesopleuron and metapleuron H scutellum to T3. Description. Body ~ 6.32 mm. Head : Head entirely with long setae. Antenna 37-segmented. Face width ~ 1.50 x longer than its height (96:64). Width of anterior ocellus ~ 0.80 x longer than POL (16:20). Eyes seemingly without interommatidial setae; median width of eye about ~ 1.15 x longer than the median width of gena in lateral view (45:39). Gena extended ventro-posteriorly into moderate prominence. Clypeus ~ 2.67 x longer than its height (72:27), with punctures; clypeal tubercles absent. Mandible bidentate. Maxillary palpus five-segmented. Labial palpus four-segmented. Galea short. Glossa short. Occipital carina absent. Mesosoma : Notauli entirely evenly crenulate. Scutellar sulcus ~ 0.30 x longer than width (22:74), with six carinae; lateral margins forming cup-like pit posteriorly. Postscutellar depression entirely rugulose. Pronotum mostly rugulose. Mesopleuron dorsally and ventrally with punctures, posterior margin strongly crenulate; precoxal sulcus crenulate nearly reaching posterior margin; epicnemial carina absent; episternal scrobe present. Metapleuron anteriorly smooth and posteriorly rugulose. Propodeum strongly rugulose, ~ 0.40 x longer than its median width (57:142); propodeal areola nearly oval, ~ 1.31 x longer than its maximum width (42:32); transverse carina absent. Legs : Basal spur on fore tibia ~ 0.58 x longer than length of basitarsus (29:50). Basal spur on mid tibia ~ 0.64 x longer than length of basitarsus (39:61). Hind tibia without apical cup-like projection; basal spur on hind tibia ~ 0.61 x longer than length of basitarsus (55:90); claws pectinate. Wings : Fore wing ~ 6.06 mm; second submarginal cell trapezoid, ~ 3.06 x longer than height (110:36); 1r absent; 3r absent; RS evenly curved; pterostigma about ~ 3.34 x longer than wide medially (117:35). Hind wing ~ 4.88 mm; 2r-m absent; 2-1A present reaching basal half. Metasoma : T1 ~ 1.13 x longer than its posterior width (79:70), antero-laterally crenulate and postero-laterally slightly rugulose. T2 ~ 0.27 x longer than its posterior width (37:136), ~ 0.55 x longer than T3 (37:67). Hypopygium without median longitudinal fold. Protruded ovipositor sheath ~ 0.46 x longer than length of hind basitarsus (41:90), apically setaceous. Color : Body mostly black. Wings entirely infuscate. Pterostigma entirely dark brown. Antenna dark brown. Inner and outer orbits orange. Mandible medially reddish brown. First laterotergite brown. Etymology. Named in honor of Mr Edward P. Van Duzee, a former curator of CAS and fellow of Entomological Society of America (ESA), the person who collected the specimen. Host. Unknown. Distribution. Retusigaster vanduzeei sp. nov. is known from Nixon, Washoe County, Nevada, USA.