Ujna liangae Yang, Meng & He, sp. nov.

(Figs 4, 49–63)

Length of males 3.8–4.4 mm, females 4.3–4.7 mm.

Coloration. Dorsum pale brown to dark brown, with median longitudinal yellow white stripe from near crown apex to near scutellum apex. Crown with lateral areas, in front of ocelli yellow white; ocelli and eyes dark. Mesonotum with lateral angles yellow white, with pair of median stripes, in females usually with pair of median spots; scutellum with apex yellow white. Forewing with costal and apical margins deeply dark; costal margin with preapical white marking divided into two by oblique red stripe. Face yellow white except for dark anterior area. Thorax and abdomen yellow white in ventral view; male subgenital plate and pygofer yellow brown to dark brown.

External features. Head anterior margin angularly produced, median length more than interocular width; coronal suture three-fifth median length; ocelli located on line between anterior eye angles; frontal suture extending onto crown and attaining ocelli. Face with frontoclypeus convex, muscle impressions indistinct, transclypeal suture obscure medially. Pronotum slightly broader than head, posterior margin approximately transverse.

Male genitalia. Pygofer with posterior margin concave medially; ventral margin with small setae; ventral process long and curved dorsally, slightly expand near apical portion, apex hooked. Subgenital plate slender, extending posteriorly as long as pygofer; surface with uniseriate macrosetae on inner margin, apical area with long or short microsetae. Connective Y-shaped. Style slender, tapered posteriorly, with apex acute, without preapical tooth or setae. Aedeagus curved dorsally from midlength to apex in lateral view, with compressed dorsal process near base, with pair of short ventral processes near midlength.

Female genitalia. Abdominal sternite VII, in ventral view, well produced posteriorly, forming projection medially. Valvulae I in lateral view broadly expanded in distal two thirds and tapered preapically; with columns of dorsal sculpture oriented posteroventrad, with dorsal sculpturing imbricate, ventral area with imbricate sculpturing in apex and indistinct strigate sculpturing in distal two thirds. Valvulae II in lateral view broad and tapered near apex, dorsal margin of blade bearing approximately 20 triangular teeth, teeth and ventroapcial portion of blade bearing secondary denticles.

Etymology. This species is named after the collector of the holotype.

Material examined. Holotype, male, China, Yunnan Province, Xishuangbanna, 20–24 February 2011, coll. Liang Wen-qing. Paratypes: 7 males, 6 females, same data as holotype; 1 male, China, Yunnan Province, Mengla, 22 July 2013, coll. Xing Ji-chun & Guo Mei-na.

Remarks. This species is similar to U. puerana (Yang & Meng, 2010) in appearance, but differs from the latter in the mesonotum with the lateral angles and a pair of median stripes yellow white and the costal margin with a red stripe interrupting the preapical white marking. Based on male genitalia characteristics, U. liangae differs from U. puerana in the aedeagus having a pair of short ventral preapical processes and the style without preapical tooth.