Homoneura (Homoneura) tianlinensis, 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 : 361-364

Homoneura (Homoneura) tianlinensis , new species

( Figs. 43-48 )

Material examined. – Holotype - male, Guangxi: Tianlin, Linaoshan (1300m), 14 Aug.2002, coll. Ding Yang ( CAU).

Diagnosis. – Wing with 7 brown spots; R 4+5 with 3 brown spots behind r-m; subcostal cell dark apically.

Description. – Body length 2.7 mm (male), wing length 3.2 mm (male).

Head dark brown, with gray dust. Frons about as long as wide and parallel-sided, with 2 brown stripes; ocellar triangle brown; oc developed, and as long as anterior or; face without spots; cheek about 1/6 height of eye. Antenna yellow brown; 3rd segment 2 times as long as wide, with dark brown apical margin; arista brown except yellow brown base, with longest hairs shorter than width of 3rd antennal segment. Proboscis yellow brown, pale yellow apically, with black and yellow hairs; palpus yellow brown, with black hairs.

Thorax dark brown, with gray dust. 0+3 dc, acr in 6 rows, 1st post-sutural dc broken. Legs yellow; femora brown, yellow apically. Fore femur with 4 posterior ventral bristles, 4 posterior dorsal bristles, and ctenidium with 8 short bristles. Mid femur with 5 anterior bristles; mid tibia with 3 spurs. Wing pale yellow; subcostal cell dark apically; dark on tip of R 2+3 to M 1+2, r-m and m-m, with 2 brown spots behind r-m on R 4+5 except apical spot; costa with 2nd, 3rd and 4th sections in proportion of 4.4:2:1; r-m before middle of discal cell; ultimate section of M 1+2 1.3 times as long as penultimate; ultimate section of M 3+4 about 1/6 of penultimate. Halter white.

Abdomen with dark brown tergites and yellow brown sternites, and with gray dust. Male genitalia ( Figs. 44-48 ): Protandrium forming an incomepletely sclerotized band, without setulae around spiracle ( Fig. 45 ); surstylus on epandrium with short anterior process and long thick posterior process bearing a tiny spine; hypandrium without apodemes, gonopod long; aedeagus long, distinctly incised apically ( Fig. 48 ).

Etymology. – The species is named after the type locality Tianlin.

Distribution. – China (Guangxi).

Remarks. – The new species is similar to Homoneura (Homoneura) singularis Yang, Hu & Zhu, 2002 , from Hainan, but can be separated from the latter by the apical spots on R 4+5 and M 1+2 being separated. In singularis , the apical spots on R

4+5

and M

1+2

are connected ( Yang et al., 2002).

Figures

Figs. 43-48. Homoneura tianlinensis, new species, male. 43. wing. 44. epandrium and protandrium, lateral view. 45. protandrium, anterior view. 46. epandrium, posterior view. 47. aedeagal complex, lateral view. 48. aedeagal complex, ventral view.