(Figs. 1–6)

Body length 6.3–6.7 mm (male); wing length 6.0– 6.7 mm (male). Female (unknown).

Head yellow. Frons about as long as wide and parallel­sided, with 2 brown stripes extending to ocellar triangle; ocellar triangle with brown edge; ocellar bristle developed, about as long as anteriormost fronto­orbital bristle; face without spots; gena about 1/5 height of eye. Antenna yellow; 1st flagellomere 1.6 times as long as wide; arista black except yellow base, with longest hairs as long as width of 1st flagellomere. Proboscis yellow, with black and yellow hairs; palpus yellow, with black hairs.

Thorax yellow. 0+3 dc (anteriormost dc clearly behind transverse scutal suture), acr in 8–9 somewhat irregular rows and equal in length, prsc longer than 1st post­sutural dc, 2 sa (anterior seta loner than posterior one). Legs yellow. Fore femur with 5 posterior ventral bristles, 7 posterior dorsal bristles, and ctenidium with 12 short bristles. Mid femur with 6 anterior bristles; mid tibia with 1 preapical anterior dorsal bristle, 7 posterior dorsal bristles and 4 apicoventral spurs. Hind trochanter and femur without secondary characters. Wing (Fig. 1) pale yellow, lightly darkened at apex of R 2+3, subapically on R 4+5 and M 1 and along crossvein dm­cu; spots on R 2+3 and R 4+5 confluent and connecting with spot on M 1; costa with 2nd (between R 1 and R 2+3), 3rd (between R 2+3 and R 4+5) and 4th (between R4+5 and M) sections in proportion of 5:1.2:0.9; r­m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 3:2.4; ultimate section of CuA 1 about 1/8 of penultimate. Halter yellow.

Abdomen yellow, edges of tergites 1–6 black brown. Male sternite 5 with concave distal border. Genitalia (male) (Figs. 2–6): Protandrium rather wide, circular, with a setula, and 7th spiracle with surrounding setulae; surstylus basally fused with epandrium, apically not furcate, with oblique acute tip in lateral view; hypandrial apodemes small, gonopod long; aedeagus long, with apical incision.

Type material. Holotype male deposited in CAU, Guizhou: Fanjingshan Mountain (27°55’N, 108°41’E) (600 m), 2002. VI. 3, Ding Yang. Paratype 1 male, same as holotype.

Remarks. The new species is somewhat similar to Homoneura (Chaetohomoneura) fuscicostata (Walker, 1856) from Malaysia, but can be separated from the latter by the short hypandrial apodemes. In fuscicostata, the hypandrial apodemes are long (Sasakawa 1992).

Etymology. The species is named after 7th spiracle with surrounding setulae.

Distribution. China (Guizhou).