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 piriformis sp. nov. urn:lsid:zoobank.org:act: BFF0E445-90C3-4CFB-B3FE-5C6E866795DC Figs 20 , 25N Etymology Named after the Latin ‘ piri ’, meaning ‘pear’, and ‘formis’, meaning ‘shape’, referring to the head shape. Fig. 19. Loboscelidia pecki Kimsey, 2012 , holotype, ♂ (CNC). A . Lateral habitus. B . Head , dorsal view. C . Head , lateral view. D . Pronotum. E . Forewing. Not to scale. Type material Holotype VIETNAM • ♀ ; Thua Thien Hue Province , Bach Ma NP , 19 km point; 16.198° N , 107.860° E ; 3–6 Aug. 2016 ; T. Mita and Y. Komeda leg.; YPT ; VNMN . Description Female ( Fig. 20A ) MEASUREMENTS . Body length 4.2 mm ; forewing length 3.6 mm . HEAD . Head ( Fig. 20B–D ) 1.9 times as long as high, 1.4 times as long as wide; inner ocular length 0.66 times as long as head width; frontal projection rectangular in frontal view ( Fig. 20B ); apical margion of frontal projection depressed ( Fig. 20B ); frons rugose, with low ridge extending from vertex along inner orbit of eye ( Fig. 20C ); frons with distinct carinae towards posterior ocelli ( Fig. 20C ); spraclypeal area with transverse carinae ( Fig. 20B ); temple 2.8 times as long as MOD ( Fig. 20C ); POL 1.1 times as long as MOD; OOL 2.0 times as long as MOD; LOL 0.43 times as long as MOD; behind ocelli without transverse depression ( Fig. 20C ); cervical expansion flattened in lateral view ( Fig. 20D ); basal part of cervical expansion constricted strongly in dorsal view ( Fig. 20C ); scape 3.0 times as long as wide; scape with longitudinal grooves; scape with transparent flange, as long as tubular part of scape, 0.36 times as wide as tubular part of scape; F1 1.2 times as long as wide; F2 as long as wide; F11 as long as wide; relative length of F1–F11: 2.3: 1.5: 1.1: 1.1: 1.1: 1.1: 1.0: 1.0: 1.0: 1.0: 1.8. MESOSOMA . Pronotum 0.80 times as long as posterior width of pronotum ( Fig. 20E ); posterior width of pronotum 1.7 times as wide as anterior width and 1.2 times as wide as head width; dorsolateral surface of pronotum carinate ( Fig. 20A ); notauli of scutum slightly curved, reaching posterior margin ( Fig. 20F ); scutellum polished and punctured ( Fig. 20F ); apico-lateral area of scutellum without longitudinal grooves ( Fig. 20F ); scrobal sulcus absent ( Fig. 20A ); metanotum with four ridges, 0.44 times as long as scutellum; ( Fig. 20F ); propodeal angle weakly developed; propodeum without transverse carina above foramen. WINGS . Forewing ( Fig. 20G ) with M curved; cu-a 0.20 times as long as R; A extending half of Cu+M; R1 0.50 times as long as R; Rs 2.8 times as long as R. LEGS . Posterior portion of tibiae longitudinally carinate; flange on forefemur 0.47 times longer, 1.2 times wider than tubular part of forefemur; flange on foretibia 0.55 times longer, 0.57 times wider than tubular part of foretibia; flange on midfemur 0.51 times longer, 0.89 times wider than tubular part of midfemur; flange on midtibia 0.55 times longer, 1.2 times wider than tubular part of midtibia; hind coxa 1.5 times as long as hind trochanter; hindcoxa dorso-laterally carinate; basal part of hindfemur strongly producing; hindfemur basally stout, apparently wider than distal part; ventral margin of hindfemur flat; outer surface of hindfemur smooth; flange on hindfemur 0.55 times longer, 0.75 tubular part of hindfemur; flange on hindtibia 0.82 times longer, 1.4 times wider than tubular part of hindtibia; hind tarsal claw without median tooth ( Fig. 25N ). PILOSITY . Frons with sparse decumbent cuneate setae ( Fig. 20C ); spraclypeal area with sparse decumbent and simple and cuneate setae ( Fig. 20B ); eye with sparse erect simple setae ( Fig. 20B ); lower gena with sparse decumbent and simple and cuneate setae cervical expansion with sparse decumbent cuneate setae ( Fig. 20D ); hypostoma with sparse decumbent cuneate setae; scape with sparse suberect and erect simple setae; pedicel with sparse suberect and erect simple setae; F1 with sparse suberect and erect simple setae; dorsal part of pronotum with sparse suberect and erect cuneate setae; lateral surface of pronotum with sparse suberect and erect cuneate setae ( Fig. 20A ); scutum with sparse decumbent and suberect cuneate setae ( Fig. 20F ); mesopleuron with sparse decumbent cuneate setae ( Fig. 20A ); tegula with sparse suberect and erect cuneate setae ( Fig. 20F ); scutellum with sparse decumbent and suberect cuneate setae ( Fig. 20F ); lateral surface of propodeum with sparse decumbent cuneate setae ( Fig. 20A ); forecoxa and foretrochanter with sparse decumbent and simple and cuneate setae; foretibia with dense suberect simple setae; midcoxa and midtrochanter with sparse decumbent simple and cuneate setae; midfemur with sparse decumbent and suberect simple and cuneate setae; midtibia with dense suberect simple setae; hindcoxa and hindtrochanter with sparse decumbent simple and cuneate setae; hindfemur with sparse decumbent and suberect simple and cuneate setae; hindtibia with dense suberect simple setae; lateral margin of T4 with sparse decumbent simple and cuneate setae. Fig. 20. Loboscelidia piriformis sp. nov. , holotype, ♀ (VNMN). A . Lateral habitus. B . Head , frontal view. C . Head , dorsal view. D . Head , lateral view. E . Pronotum, dorsal view. F . Mesosoma, dorsal view. G . Forewing. Scale bars = 0.5 mm. COLORATION . Body reddish brown; antenna reddish brown; legs reddish brown; flanges yellowish brown; ribbon-like setae whitish yellow. Male Unknown. Distribution Vietnam (Central Vietnam ) ( Fig. 29 ). Remarks This new species can easily distinguished from other species by the pear-shaped head in the dorsal view (diamond- or kite-shaped in other species).