Loboscelidia convexa sp. nov.

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Figs 7, 25D

Etymology

Named after the Latin ‘ convexa ’, meaning ‘convex’, referring to the distinctly convex cervical expansion.

Type material

Holotype VIETNAM • ♂; Bac Kan Province, Ba Be NP; 22°24′42.24″ N, 105°37′42.55″ E; 2 Jul. 2014; T. Mita leg.; VNMN.

Description

Male (Fig. 7A)

MEASUREMENTS. Body length 4.0 mm; forewing length 4.0 mm.

HEAD. Head (Fig. 7B–D) 1.8 times as long as high, 1.1 times as long as wide; inner ocular length 0.57 times as long as head width; frontal projection rectangular in frontal view (Fig. 7B); apical margion of frontal projection depressed (Fig. 7C); frons with transverse microstriae, with high ridge extending from vertex along inner orbit of eye (Fig. 7C); frons with indistinct wrinkles towards median ocellus (Fig. 7C); frons with frontal line; spraclypeal area with transverse carinae (Fig. 7B); temple 0.73 times as long as MOD (Fig. 7C); POL 1.1 times as long as MOD; OOL 1.3 times as long as MOD; LOL 0.33 times as long as MOD; behind ocelli with transverse depression (Fig. 7C); cervical expansion strongly convex in lateral view, with longitudinal grooves (Fig. 7D); basal part of cervical expansion constricted weakly in dorsal view (Fig. 7C); scape 2.8 times as long as wide; scape with longitudinal grooves; scape with transparent flange; F1 1.8 times as long as wide; F2 2.0 times as long as wide; F11 3.6 times as long as wide; relative length of F1–F11: 1.2: 1.1: 1.1: 1.1: 1.1: 1.1: 1.1: 1.1: 1.0: 1.0: 1.4.

MESOSOMA. Pronotum 0.71 times as long as posterior width and convex in lateral view (Fig. 7E); posterior width of pronotum 1.5 times as wide as anterior width and 1.1 times as wide as head width; dorsolateral surface of pronotum carinate (Fig. 7A); notauli of scutum slightly curved, reaching posterior margin (Fig. 7F); scutellum punctured, with lateral carina (Fig. 7F); scrobal sulcus present, weakly depressed (Fig. 7A); metanotum without ridge, 0.61 times as long as scutellum (Fig. 7F); propodeal angle weakly developed; propodeum with transverse carina above foramen.

WINGS. Forewing (Fig. 7G) with M curved; cu-a 0.72 times as long as R; A extending Cu+M; R1 0.64 times as long as R; Rs 2.4 times as long as R.

LEGS. Tibiae carinate; flange on forefemur 0.65 times longer, 1.1 times wider than tubular part of forefemur; flange on foretibia 0.67 times longer, 0.83 times wider than tubular part of foretibia; flange on midfemur 0.72 times longer, as wide as tubular part of midfemur; flange on midtibia 0.76 times longer, 0.83 times wider than tubular part of midtibia; hindcoxa 2.5 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 0.79 times longer, 1.3 times wider than tubular part of hindfemur; flange on hindtibia 0.83 times longer, 1.1 times wider than tubular part of hindtibia.

PILOSITY. Spraclypeal area with sparse suberect cuneate setae (Fig. 7C); temple with sparse decumbent cuneate setae; lower gena with sparse decumbent cuneate setae (Fig. 7D); hypostoma with sparse decumbent and suberect simple cuneate setae; propleuron with sparse decumbent cuneate and scale-like setae (Fig. 7A); forecoxa and foretrochanter with dense decumbent cuneate setae; foretibia with sparse decumbent suberect simple and cuneate setae; midcoxa and midtrochanter with dense decumbent cuneate setae; midtrochanter with sparse decumbent cuneate setae; midfemur with sparse decumbent and suberect simple cuneate setae; hindcoxa and hindtrochanter with sparse decumbent cuneate setae; hindfemur and hindtibia with sparse decumbent and suberect simple and cuneate setae.

COLORATION. Body red; antenna reddish brown; legs reddish brown; flanges yellowish brown; ribbon-like setae whitish yellow.

Female

Unknown.

Distribution

Vietnam (Northern Vietnam) (Fig. 26).

Remarks

Loboscelidia convexa sp. nov. resembles L. asiana, L. barbata sp. nov. and L. sisik in having the following characteristic: scale-like setae on the lower gena. However, L. convexa sp. nov. can be distinguished by the following characteristics: lower gena bearing cuneate setae (with scale-like setae in other species); rectangular frontal projection (triangular in L. asiana and L. sisik); smooth cervical expansion with longitudinal furrow (without longitudinal furrow in L. asiana and L. sisik); and curved M vein (straight in L. sisik).