Membranacea distincta Yu & Yang, sp. nov.

(Figs 1–11)

Length: male 4.1–4.2mm.

Body robust, dorsal coloration golden yellow (Figs 1, 2). Crown with median black apical spot surrounded with cream stripe; coronal suture brown and margined with cream, beside with a brown spot (Figs 1, 3). Eyes dark (Figs 1, 2, 3). Ocellus present (Fig. 3). Face elongate and convex in profile (Fig. 2). Pronotum wider and longer than crown, with median cream spot at anterior margin (Fig. 1). Scutellum yellow with basolateral triangles and apex black; scutoscutellar sulcus distinct, not reaching lateral margin of scutellum (Fig. 1). Forewing rounded apically, apical cells less than 1/3 total length, RP and MP’ separated and originated from r cell, MP’’+CuA’ from m cell, width of c cell equal with r cell. Hindwing with CuA bifurcated. Abdomen brownish. Legs yellow except claws brownish (Figs 1, 2).

Ventral male abdominal apodemes broad, reaching segment 4 (Fig. 4), Pygofer with dosrsal margin strongly concave, apex with few microsetae (Figs 5, 6). Subgenital plate broad, with an oblique line of 14 macrosetae and ca. 23 microsetae in 3 rows; outer margin bearing 5 moderately long and stout setae forming the basal group and after that along with ca. 25 marginal setae (Fig. 7). Paramere elongate, with apical teeth and setae (Fig. 8). Aedeagus arcuate in lateral view, with broad single central flange on ventral surface from midlength to apex (Fig. 9), subapically with pair of lateral flanges on each side, inner flange narrower than outer one; preatrium more than half length of shaft (Fig. 10). Connective with base broad, apex narrow, apical margin deeply emarginate (Fig. 10). Anal tube process only visible in ventral view (Fig. 11).

Etymology. The new species is named for its single central flange broad and distinct.

Material examined. Holotype, 1 ♂, Mt. Leigong, Guizhou Province, 5. July. 2005, coll. Yuehua Song. Paratypes, 1 ♂, Huaping, Guangxi Province, 18. May. 2012, coll. Hu Li; 2 ♂, Huaping, Guangxi Province, 18–19. May. 2012, coll. Zhihua Fan.

Remarks. The new species is similar to M. stenoprocessa Yu & Yang, 2013 and M. plana Qin & Zhang, 2011, but differs from the latter in having the single central flange broad and extending from midlength to apex, the narrower flange is inside the broader one (Figs 9, 10).