Homoneura (Homoneura) immaculata (de Meijere, 1910)

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 : 355-358

Homoneura (Homoneura) immaculata (de Meijere, 1910)

( Figs. 19-24 )

Lauxania immaculata de Meijere, 1910 . Type locality – Java.

Material examined. – 1 male, Guangxi: Tianlin, Linaoshan (1300m), 14 Aug.2002, coll. Ding Yang ( CAU) .

Diagnosis. – Thoracic dorsum black brown, pleuron and venter yellow with brown spots; scutellum black brown with yellow edge. Wing clear, only dark on m-m; surstylus short and winding upward.

Redescription. – Body length 4.1 mm (male), wing length 3.8 mm (male).

Head yellow, with yellow dust. Frons about as long as wide and slightly converging backward, with 2 brown stripes; ocellar triangle brown; oc developed, and longer than anterior or; face with 2 brown spots at middle; cheek about 1/8 height of eye. Antenna dark brown; 3rd segment pale brown, pale yellow medially, 1.6 times as long as wide; arista brown except yellow brown base, with longest hairs longer than width of 3rd antennal segment. Proboscis yellow, pale yellow apically, with black and yellow hairs; palpus yellow, with black hairs.

Thoracic dorsum black brown, pleuron and venter yellow with brown spots; scutellum black brown with yellow edge. 0+3 dc, acr in 6 rows, 1st post-sutural dc close to suture, prsc about as long as 1st post-sutural dc. Legs yellow. Fore femur with 4 posterior ventral bristles, 6 posterior dorsal bristles, and ctenidium with 14 short bristles. Mid femur with 6 anterior bristles; mid tibia with 3 spurs. Wing pale yellow, only dark on m-m; costa with 2nd, 3rd and 4th sections in proportion of 3:1.4:0.8; r-m slightly before middle of discal cell; ultimate section of M 1+2 1.4 times as long as penultimate; ultimate section of M 3+4 about 1/5 of penultimate. Halter white.

Abdomen with black brown dorsum and yellow venter; tergites 6-9 yellow, 6th tergite with a brown stripe at middle; cercus brown. Male genitalia ( Figs. 20-24 ): Protandrium forming a sclerotized band with a ventral segment, with a small dorsal protuberance directed forward, without setulae around spiracle ( Fig. 21 ); surstylus on epandrium short and winding upward; hypandrium H-shaped, its apodemes distinct, gonopod long; aedeagus short and broad, with distinct apical incision ( Fig. 24 ).

Distribution. – China (Guangxi); Java, Malaysia. New to China.

Figures

Figs. 19-24. Homoneura immaculata (de Meijere, 1910) male. 19. wing. 20. epandrium and protandrium, lateral view. 21. protandrium, anterior view. 22. epandrium, posterior view. 23. aedeagal complex, lateral view. 24. aedeagal complex, ventral view.