Loboscelidia bachmaensis Hisasue & Pham & Mita 2023, sp. nov.

Loboscelidia bachmaensis sp. nov. urn:lsid:zoobank.org:act: 45AE8FE5-9A36-4E8C-9E81-AD92B60E90D0 Figs 4, 25A Etymology The species epithet is named after the type locality, “Bạch Mã”. Type material Holotype VIETNAM • ♂; Thua Thien Hue Province, Bach Ma NP, 19 km point; 16.192° N, 107.849° E; 3–6 Aug. 2016; T. Mita and Y. Komeda leg.; YPT; VNMN. Paratypes VIETNAM • 2 ♂♂; same collection data as for holotype; VNMN. Description Male (Fig. 4A) MEASUREMENTS. Body length 2.7 mm; forewing length 2.7 mm. HEAD. Head (Fig. 4B–D) 1.5 times as long as high; 1.2 times as long as wide; inner ocular length 0.66 times as long as head width; frontal projection rectangular in frontal view (Fig. 4B); apical margin of frontal projection straight; lower part of frontal projection shorter than upper part (Fig. 4D); frons granulate, finely microstriate (Fig. 4C); frons with low ridge extending from median ocellus along inner orbit of eye (Fig. 4C); spraclypeal area with transverse carinae (Fig. 4B); temple 0.80 times as long as MOD (Fig. 4C); POL 0.8 times as long as MOD; OOL 1.2 times as long as MOD; LOL 0.2 times as long as MOD; behind ocelli without transverse depression (Fig. 4C); cervical expansion convex in lateral view (Fig. 4D); basal part of cervical expansion constricted weakly in dorsal view (Fig. 4C); scape 2.1 times as long as wide; scape with longitudinal grooves; F1 1.4 times as long as wide; F2 1.6 times as long as wide; F11 3.2 times as long as wide; relative length of F1–F11: 1.0: 1.1: 1.2: 1.2: 1.2: 1.2: 1.3: 1.3: 1.3: 1.3: 1.8. MESOSOMA. Pronotum 0.81 times as long as posterior width of pronotum (Fig. 4F); posterior width of pronotum 1.2 times as wide as anterior width and as wide as head width; dorsolateral surface of pronotum carinate (Fig. 4A); notauli of scutum slightly convergent to posterior, not reaching posterior margin (Fig. 4F); median part of scutellum polished (Fig. 4E); posterior part of scutellum rugose; scrobal sulcus present, weakly depressed (Fig. 4A); metanotum with three ridges; metanotum 0.39 times as long as scutellum (Fig. 4E); propodeal angle weakly developed; propodeum without transverse carina above foramen. WINGS. Forewing with M curved (Fig. 4G); cu-a 0.37 times as long as R; A extending half of Cu+M; R1 0.67 times as long as R; Rs 2.8 times as long as R. LEGS. Tibiae smooth; flange on forefemur 0.61 times longer, 0.89 times wider than tubular part of forefemur; flange on foretibia 0.42 times longer, 0.50 times wider than tubular part of foretibia; flange on midfemur 0.76 times longer, 0.70 times wider than tubular part of midfemur; flange on midtibia 0.76 times longer, 0.67 times wider than tubular part of midtibia; 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 0.74 times longer, 1.2 times wider than tubular part of hindfemur; outer surface of hindtibia smooth; flange on hindtibia 0.79 times longer, 2.0 times wider than tubular part of hindtibia; hindtarsal claw with tooth reaching ⅓ of hindtarsal claw. PILOSITY. Lower gena with sparse decumbent simple and cuneate setae (Fig. 4D); scape with sparse decumbent simple and simple setae; pedicel with sparse decumbent cuneate setae; dorsal surface of pronotum with sparse decumbent cuneate setae (Fig. 4F); forefemur with sparse decumbent and suberect simple setae; hindtibia with sparse decumbent cuneate setae. COLORATION. Body reddish brown; antenna reddish brown; legs reddish brown; flanges yellowish brown; ribbon-like setae white. Female Unknown. Distribution Vietnam (Central Vietnam) (Fig. 26). Remarks This species closely resembles L. vietnamensis sp. nov. in having the following characteristics: weakly convex cervical expansion, F11 3.0 times as long as wide, and a polished scutellum. However, L. bachmaensis sp. nov. can be distinguished by the following characteristics: frontal projection equal to shorter than upper part in lateral view (longer than above in L. vietnamensis sp. nov.); temple 0.80 times as long as MOD (0.3–0.6 times longer than in L. vietnamensis sp. nov.); POL shorter than MOD (longer than MOD in L. vietnamensis sp. nov.); tooth of hindtarsal claw reaching ⅓ of hindtarsal claw (less than ¼ in L. vietnamensis sp. nov.).Published as part of Hisasue, Yu, Pham, Thai-Hong & Mita, Toshiharu, 2023, Taxonomic revision of the genus Loboscelidia Westwood, 1874 (Hymenoptera: Chrysididae: Loboscelidiinae) from Vietnam, pp. 1-68 in European Journal of Taxonomy 887 (1) on pages 7-9, DOI: 10.5852/ejt.2023.887.2203, http://zenodo.org/record/822252