Homoneura (Homoneura) brevis, Gao & Yang, 2004

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 : 352-355

Homoneura (Homoneura) brevis , new species

( Figs. 7-12 )

Material examined. – Holotype - male, Guangxi: Longjin, Daqingshan Mountain , 15 May.1963, coll. Jikun Yang ( CAU)

Paratypes – 1 female, Guangxi: Longsheng, Cujiang (800m), 24 Jun.1982, coll. Jikun Yang ( CAU) .

Diagnosis. – W ing with 5 spots on tip of R 2+3 to M 1+2, preapical section of R 4+5 and m-m, apical spots on R 2+3 to M 1+2 rather large and connected; epandrium extruding forward ventrally.

Description. – Body length 6.7 mm, wing length 8.0 mm or 7.3 (female) mm.

Head yellow, with yellow dust. Frons about as long as wide, parallel-sided; ocellar triangle brown; oc as long as anterior or; face without spot; cheek about 1/6 height of eye. Antenna yellow; 3rd segment with apex yellow brown, 2 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, 10 rows of acr, prsc longer than 1st post-sutural dc. Legs yellow. Fore femur with 4 posterior ventral bristles, 6-7 posterior dorsal bristles, and ctenidium with 14 bristles. Mid femur with 5 anterior bristles, mid tibia with 3 spurs. Wing pale yellow, with 5 brown spots on tip of R 2+3, R 4+5 and M 1+2 each, middle of R 4+5 and on m-m, apical spots on R 2+3 to M 1+2 rather large and connected; costa with 2nd, 3rd and 4th sections in proportion of 9:2:1.6; r-m before middle of discal cell; ultimate section of M 1+2 1.5 times as long as penultimate; ultimate section of M

3+4

about 1/8 of penultimate. Halter yellow.

Abdomen yellow, with pale gray dust. Male genitalia ( Figs. 8-12 ): Protandrium forming an incompletely sclerotized band; epandrium extruding forward ventrally, surstylus rather short; hypandrial apodemes indistinct, gonopod long; aedeagus with acute apico-lateral processes, aedeagal apodeme very short and thin.

Etymology. – The species is named after the short surstylus.

Distribution. – China (Guangxi).

Remarks. – The new species is similar to Homoneura (Homoneura) chinensis Malloch, 1929 , and grandis ( Kertész, 1915) in the wing markings, but can be separated from them by the epandrium extruding forward ventrally and surstylus rather short. In chinensis and grandis, the epandrium is not extruding forward ventrally, and the surstylus is distinct ( Malloch, 1929).

Figures

Figs. 7-12. Homoneura brevis, new species, male. 7. wing. 8. epandrium and protandrium, lateral view. 9. protandrium, anterior view. 10. epandrium, posterior view. 11. aedeagal complex, lateral view. 12. aedeagal complex, ventral view.