Homoneura (Homoneura) cornuta Sasakawa, 2001

Gao, Caixia & Yang, Ding, 2004, A Review Of The Genus Homoneura From Guangxi, China (Diptera: Lauxaniidae), Raffles Bulletin of Zoology 52 (2), pp. 351-364 : 355

Homoneura (Homoneura) cornuta Sasakawa, 2001

( Figs. 13-18 )

Homoneura cornuta Sasakawa, 2001: 85 . Type locality – Viet Nam.

Material examined. – 1 male, 1 female, Guangxi: Longsheng, Hongtan, 25 Jun.1986, Jikun Yang ( CAU) .

Diagnosis. – W ing with 5 brown spots on tip of R 2+3 to M 1+2, r-m and m-m, but spot on m-m disappeared gradually backward.

Redescription. – Body length 5.7 mm (male) or 5.8 mm (female), wing length 5.9 mm (male) or 6.7 mm (female).

Head yellow, with yellow dust. Frons about as wide as long, parallel-sided; ocellar triangle pale brown; oc as long as anterior or; face without spot; cheek about 1/8 height of eye. Antenna yellow brown; 3rd segment 1.6 times as long as wide; arista black except testaceous base, with longest hairs as long as width of 3rd antennal segment. Proboscis yellow brown, with black and yellow hairs; palpus yellow, with black hairs.

Thorax yellow, with yellow dust. 0+3 dc, 8 rows of acr, prsc longer than 1st post-sutural dc. Legs yellow. Fore femur with 4 posterior ventral bristles, 7 posterior dorsal bristles, and ctenidium with 14 short bristles. Mid femur with 4 anterior bristles, mid tibia with 3 spurs. Wing pale yellow, with 5 brown spots on tip of R 2+3 to M 1+2, r-m and m-m; costa with 2nd, 3rd and 4th sections in proportion of 10:3:2; r-m slightly behind middle of discal cell; ultimate section of M 1+2 1.4 times as long as penultimate; ultimate section of M 3+4 about 1/7 of penultimate. Halter yellow to brown.

Abdomen testaceous, with dense white dust; tergites 5-6 with black spot apically. Male genitalia ( Figs. 14-18 ): Protandrium forming a sclerotized band with a ventral segment, without setulae around spiracle ( Fig. 15 ); surstylus on epandrium with 3 acute processes; hypandrial apodemes small, gonopod bifurcate apically; aedeagus with deep apical incision ( Fig. 18 ).

Distribution. – China (Guangxi); Vietnam. New to China.

Figures

Figs. 13-18. Homoneura cornuta Sasakawa, male. 13. wing. 14. epandrium and protandrium, lateral view. 15. protandrium, anterior view. 16. epandrium, posterior view. 17. aedeagal complex, lateral view. 18. aedeagal complex, ventral view.