Leucodellus xizangensis sp. nov.

(Figs. 5–6, 9, 18–21, 24)

Type specimens: Holotype: male, CHINA: Gyitang (30°44'N, 97°20'E), Xizang Autonomous Region, alt. 3600m, 13.ix.1976, Yin-heng Han leg.. Paratypes: 2 males, 4 females, same data as holotype.

Diagnosis: Relatively large, elongate ovoid, total length 4.19–4.22 (male) 3.71–3.76 (female); vestiture with pale simple setae only; general coloration pale; membrane large; tibial spines black, base portion of hind tibia pale; vesica strongly twisted with serrations on dorsal surface, posterior spine hooked (Fig.18). Similar in body size and coloration to L. albidus, separated from L. albidus by the structure of vesica.

Description: Male (Fig. 5): Relatively large, elongate-ovoid.

Coloration: General coloration pale; vestiture with pale simple setae only; apex of labium infuscate; all femora with numerous small dark spots (Fig. 9); tibiae entirely pale, tibial spines with dark spots at bases; tarsal segment III and claws darkened. Structure: Body relatively broad, dorsum moderately shining, smooth; vestiture composed of recumbent, pale, weakly shining, simple setae; head almost vertical, clypeus not very distinctly visible from above; frons and vertex broad and flattened in dorsal view; posterior margin of vertex weakly rounded; antenna inserted below ventral margin of eye; antennal segments III and IV slender than segment II, total length shorter than segment II; labium reaching to posterior margin of hind trochanters; hemelytra nearly parallel-sided, lateral corial margin slightly convex; membrane large relative to total size of wing; pygophore large. Male genitalia (Figs. 18–21): Vesica relatively stout, strongly twisted, with serrations on dorsal surface, anterior apical spine much longer than posterior and decurved apically, posterior spine hooked; phallotheca heavily sclerotized; left paramere boat-shaped; right paramere lanceolate.

Female (Fig. 6): Body shape and coloration are very similar to male’s, but smaller than in male.

Distribution: China (Xizang).

Etymology: Named for the area (Xizang Autonomous Region of China) where the type material was found.