Thagria melanoloma Wang & Zhang, sp. nov.

(Figs. 21–30)

Description. Measurements. Male, body length: 6.90 mm; head width: 1.80 mm; crown length×width: 0.75× 0.96 mm; eye width: 0.57 mm; clypeus length: 1.35 mm; pronotum length×width: 0.75× 2.16 mm; mesonotum length: 1.09mm. female, unknown.

External morphology. Crown pale brown, with disc darker in color; eyes and ocelli whitish gray (Fig. 22). Face pale brown, with middle region brown; gena with black spot blow each eye (Fig. 23). Pronotum black; mesonotum black with brown edges (Fig. 22). Forewings brownish translucent, with margins darker brown anteriorly and paler apically; venation black, with ivory spots (Fig. 21, 24). Legs light brown (Fig. 23).

Head narrower than pronotum, anterior margin rounded; crown wider than eye width, beyond eyes about 1/4 median length; coronal suture about half of median length; ocelli position about 1/3 of crown length distally (Fig. 22). Face with clypeus long, lateral margins parallel; clypellus short, with base inflated (Fig. 23). Crown, pronotum and mesonotum midline ratio about 1:1:1.4. Forewings typical.

Male genitalia. Pygofer in lateral view with short and broad caudoventral lobe, caudodorsal processes truncate (Fig. 25) and incurvate (Fig. 26). Segment X ventral processes long, exposed at apex of pygofer, broad in lateral view but abruptly tapered at about 1/3 length to apex (Fig. 25). Aedeagus slender, reaching to 3/4 length of ventral paraphysis; the latter concave, apex bifurcate, with small projection subapically on ventral surface (Figs. 28–29). Style very long, gradually tapered distally, with inner lateral margin serrate; connective broadly Y-shaped (Fig. 27). Dorsal connective U-shaped with very short basal process (Fig. 26). Subgenital plate rounded apically, with fine setae laterally, ventral surface with row of macro setae (Fig. 30).

Material examined. Holotype: male, CHINA: Mengla County, Xishuangbanna, Yunnan Province, 657± 15m, 21°24′115″N, 101°37′015″E, 29 JUN 2012, coll. Zhang & Chen, No. Hm 022021. (NWAFU)

Etymology. This specific name is derived from the Latin word “ melanolomus ” refering to its darker-brown anterior margin of forewing.

Remarks. This species is similar to T. hamula, T. subta, T. acrodens (Freytag, 2010: 435, Photos 1–6) and T. biretrorsa (Nielson, 2013: 42, Plate 1-c), but differs from these species by the shape of the segment X ventral processes and the ventral paraphysis, and the serrate lateral margin of the style.