Taxonomic revision of the genus Loboscelidia Westwood, 1874 (Hymenoptera: Chrysididae: Loboscelidiinae) from Vietnam Author Hisasue, Yu D2E20D5E-B406-4169-9B1D-A4D0078D06EE Entomological Laboratory, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, Fukuoka, 819 - 0395, Japan. & Ogasawara Division of Japan Wildlife Research Center, Okumura, Chichijima, Ogasawara, Tokyo 100 - 2101, Japan. hybrizonist@gmail.com Author Pham, Thai-Hong B226B19B-509B-4878-B2FD-8505B688A1D2 Mientrung Institute for Scientific Research, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology (VAST), 321 Huynh Thuc Khang, Hue, Vietnam. & Graduate School of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam. phamthai@vnmn.vast.vn Author Mita, Toshiharu 6CC49F2C-C91C-463C-9C2D-8269588E1A6A Entomological Laboratory, Faculty of Agriculture, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, 819 - 0395 Japan. t3mita@agr.kyushu-u.ac.jp text European Journal of Taxonomy 2023 2023-08-04 887 1 1 68 http://zoobank.org/788ae14a-0698-4c42-819c-bc2412f76fca journal article 60724 10.5852/ejt.2023.887.2203 e07425be-9a2c-4459-aa8b-b51c90eafc0f 2118-9773 8222523 788AE14A-0698-4C42-819C-BC2412F76FCA Loboscelidia squamosa sp. nov. urn:lsid:zoobank.org:act: 748BCA32-71CC-4F1E-B37E-65254E040FBE Figs 22 , 25O , 29–30 Etymology Named after the Latin ‘ squamosa ’, meaning ‘a scale’, referring to the scale-like setae on the body. Type material Holotype VIETNAM • ♀ ; Thua Thien Hue Province , Bach Ma NP , 19 km point; 16.198° N , 107.860° E ; 3–6 Jul. 2016 ; T. Mita and Y. Komeda leg.; YPT ; VNMN . Paratypes VIETNAM • 1 ♀ ; Ninh Binh Province , Cuc Phuong Natonal Park ; 27 Aug. 2019 ; Y. Hisasue leg.; VNMN • 1 ♀ ; same locality as for preceding; 21 Aug. 2019 ; Y. Hisasue et al. leg.; FIT ; VNMN . Description Female ( Fig. 22A ) MEASUREMENTS . Body length 4.7 mm ; forewing length 4.2 mm . HEAD . Head ( Fig. 22B–D ) 1.7 times as long as high, 1.1 times as long as wide; inner ocular length 0.67 times as long as head width; frontal projection rectangular in frontal view ( Fig. 22C ); frons rugose, with transverse grooves ( Fig. 22C ); frons with low ridge extending from vertex along inner orbit of eye ( Fig. 22C ); spraclypeal area with transverse carinae ( Fig. 22B ); temple 0.67 times as long as MOD ( Fig. 22C ); POL 1.6 times as long as MOD; OOL 2.8 times as long as MOD; LOL 0.60 times as long as MOD; behind ocelli with transverse depression ( Fig. 22C ); cervical expansion convex in lateral view ( Fig. 22D ), with longitudinal grooves; basal part of cervical expansion constricted weakly in dorsal view ( Fig. 22C ); scape 3.2 times as long as wide; scape with longitudinal grooves; scape with transparent flange, 0.29 times as long as tubular part of scape, 0.67 times as wide as tubular part of scape; F1 1.4 times as long as wide; F2 1.1 times as long as wide; F11 1.1 times as long as wide; relative length of F1–F11: 2.0: 1.5: 1.3: 1.2: 1.1: 1.0: 1.0: 1.0: 0.8: 0.8: 1.1. MESOSOMA . Pronotum 0.70 times as long as posterior width of pronotum ( Fig. 22F ); posterior width of pronotum 1.6 times as wide as anterior width and 1.1 times as wide as head width; dorsolateral surface of pronotum carinate ( Fig. 22A ); notauli of scutum slightly curved, reaching posterior margin ( Fig. 22G ); scutellum polished and punctured and rugose ( Fig. 22G ); apico-lateral area of scutellum punctured, without longitudinal carina ( Fig. 22G ); metanotum punctured, without ridge ( Fig. 22G ); scrobal sulcus present, weakly depressed ( Fig. 22A ); metanotum 0.39 times as long as scutellum ( Fig. 22G ); propodeal angle strongly developed; propodeum without transverse carina above foramen. WINGS . Forewing ( Fig. 22E ) with M curved; cu-a 1.3 times as long as R; A extending Cu+M; R1 0.90 times as long as R; Rs 3.3 times as long as R. LEGS . Femora and tibiae longitudinally carinate ( Fig. 22A ); tibiae without transparent flanges but transformed flattened toward ventral margin; flange on forefemur 0.61 times longer, as wide as tubular part of forefemur; flange on midfemur 0.67 times longer, 1.7 times wider than tubular part of midfemur; hind coxa 1.8 times as long as hind trochanter; hind coxa dorso-laterally carinate; basal part of hindfemur producing, strongly producing, simple; hindfemur basally stout, apparently wider than distal part; ventral margin of hindfemur flat; outer surface of hindfemur smooth; flange on hindfemur 0.49 times longer, 0.92 times wider than tubular part of hindfemur; hind tarsal claw with one median tooth, not reaching to tarsal claw ( Fig. 25O ). Fig. 22. Loboscelidia squamosa sp. nov. , holotype, ♀ (VNMN). A . Lateral habitus. B . Head , dorsal view. C . Head , frontal view. D . Head , lateral view. E . Forewing. F . Pronotum, dorsal view. G . Mesosoma, dorsal view. Scale bars = 0.5 mm. PILOSITY . Frons with dense decumbent scale-like setae ( Fig. 22B ); spraclypeal area with dense decumbent scale-like setae ( Fig. 22B ); eye with dense decumbent scale-like setae ( Fig. 22B ); temple with dense decumbent cuneate and scale-like setae ( Fig. 22D ); lower gena with dense decumbent scale-like setae ( Fig. 22D ); cervical expansion with dense decumbent scale-like setae ( Fig. 22C ); hypostoma with dense decumbent cuneate and scale-like setae; scape with dense decumbent cuneate setae; pedicel with dense decumbent cuneate setae; F1 with dense decumbent cuneate setae ( Fig. 22A–B ); dorsal surface of pronotum with dense decumbent cuneate setae ( Fig. 22F ); lateral surface of pronotum with dense decumbent cuneate setae ( Fig. 22A ); propleuron with dense decumbent cuneate setae ( Fig. 22A ); scutum with dense decumbent cuneate setae ( Fig. 22F ); mesopleuron with dense decumbent cuneate setae ( Fig. 22A ); tegula with dense decumbent cuneate setae ( Fig. 22G ); scutellum with dense decumbent cuneate setae ( Fig. 22G ); lateral surface of propodeum with dense decumbent cuneate setae ( Fig. 22A ); legs with dense decumbent scale-like setae ( Fig. 22A ); lateral margin of T4 with sparse decumbent cuneate and scale-like setae. COLORATION . Body reddish brown; antenna reddish brown; legs reddish brown; flanges yellowish brown; ribbon-like setae whitish yellow. Male Unknown. Distribution Vietnam (Northern Vietnam , Central Vietnam ) ( Fig. 29 ). Host Oxyartes sp. ( Lonchodidae : Necrosciinae ) based on the foraging behavior of a female. Remarks This new species can be easily distinguished from any other species by the dense scale-like setae on the body. A paratype female (Cuc Phuong, 21 August 2019 ) was collected by FIT at night ( 9 p. m.). The female attacks the eggs of Oxyartes sp. and buries them in the soil. Details of the foraging behavior are provided in the discussion.