Species of the subgenus Neohomoneura van der Wulp from Hainan in China (Diptera, Lauxaniidae) Author Shi, Li Author Yang, Ding text Zootaxa 2008 1793 28 46 journal article 10.5281/zenodo.182594 8d66a033-d38f-405d-aac0-804628273f72 1175-5326 182594 Homoneura (Neohomoneura) tricuspidata sp. nov. ( Figs. 8 , 31–35 ) Diagnosis. Wing yellow, apical spot on R4+5 confluent with that on R2+3 and M1+2; spots on R4+5 and M1+2 not extending to vein tip, a stripe-like spot on dm-cu . Male tergites 2–6 (female 2–7) each with dark posterior margin and male tergites 4–6 (female 4–7) each with a dark triangular median spot connected with dark posterior margin. Aedeagus with 2 small tiny spines basally and 2 furcated lateral processes subapically. Description. MALE. Body length 6.6–7.0 mm, wing length 6.1–6.6 mm . FEMALE. Body length 6.0– 6.4 mm , wing length 5.4–6.0 mm. Head yellow to brownish yellow. Frons about as long as wide and parallel–sided, with 2 brown stripes extending to ocellar triangle; ocellar triangle brownish; oc developed, about longer than anteriormost or ; gena about 1/4 height of eye. Antenna yellow, 1st flagellomere 2.0 times as long as wide; arista dark except brownish base, with longest hairs longer than width of 1st flagellomere. Proboscis yellow, with yellowish hairs and dark hairs; palpus yellow, with dark hairs. Thorax yellow to brownish yellow. Mesoscutum with 0+3 dc (anteriormost dc clearly behind transverse scutal suture), acr in 10 somewhat irregular rows, uniformly short hair–like; prsc longer than 1st post–sutural dc . Legs yellow, tarsomeres 3–5 brownish yellow. Fore femur with 5 strong pv , 8 pd , and ctenidium with 11 short bristles; fore tibia with 1 long preapical ad and 1 short apv . Mid femur with 5 a and 1 app , mid tibia with 1 strong preapical ad , 6 short pd and 3 strong apv . Hind femur with a row of weak av (only 3 apical bristles distinct) and 1 preapical ad ; hind tibia with 1 weak preapical ad and 1 short av ; 1st tarsomere with rows of short and dense v . Wing ( Fig. 8 ) yellow, apical spot on R4+5 confluent with that on R2+3 and M1+2, spots on R4+5 and M1+2 not extending to vein tip; apical spot on R4+5 with basal extremity at same vertical level or before that on R2+3, apical spot on R2+3 with basal extremity beyond dm-cu ; a stripe–like spot on dm-cu , subcostal cell hyaline; costa with 2nd (between R1 and R2+3), 3rd (between R2+3 and R4+5) and 4th (between R4+5 and M1+2) sections in proportion of 3.0: 0.75: 0.54; r-m before middle of discal cell; ultimate and penultimate sections of M 1 in proportion of 1.73: 2.71; ultimate section of CuA1 about 1/12 of penultimate. Halter yellow. Abdomen yellow to brownish yellow. Male tergites 2–6 (female 2–7) each with dark posterior margin and male tergites 4–6 (female 4–7) each with a dark triangular median spot connected with dark posterior margin. Male genitalia ( Figs. 31–35 ): protandrium with a ventral bridge and two hairs around spiracle; surstylus moderately long, narrowed, strongly curved backward with a short acute tip; hypandrium Y–shaped, gonopod long and cylindrical; aedeagal apodeme longer than aedeagus; aedeagus broadened, with a deep apical incision, with 2 small tiny spines basally and 2 furcated lateral processes subapically. Type material. Holotype male, Yinggeling National Nature Reserve, Hongmao village ( 430 m ), 19. X. 2007 , Xingyue Liu. Paratypes : 1 female , Hainan: data same as holotype ; 2 males , 1 female , Hainan: Bawangling National Nature Reserve, Donger station ( 1000 m ), 22. X. 2007 , Xingyue Liu; 1male , Hainan: Bawangling National Nature Reserve, Donger station ( 1000 m ), 22. V. 2007 , Junhua Zhang; 1 male , 1 female , Hainan: Wuzhishan National Nature Reserve, Dengshandao ( 1000 m ), 17. V. 2007 , Kuiyan Zhang; 4 males , 2 females , Bawangling National Nature Reserve, Donger station ( 1000 m ), 21-22. X. 2007 , Ding Yang. Distribution. China (Hainan). Remarks. The new species is very similar to Homoneura ( Neohomoneura ) guangxiensis Gao & Yang from China (Guangxi) in all apical spots confluent and the aedeagus with 2 lateral processes, but it can be separated from the latter by the surstylus strongly curved backward with a short acute tip, the aedeagus long and broad with a pair of large subapical lateral processes furcated apically. In guangxiensis , the surstylus is weakly curved backward without the acute tip; the aedeagus is very short and V–shaped, apically with a pair of small lateral hamuli not furcated ( Gao & Yang, 2004 ). Etymology. Latin, feminine, ‘ tricuspidata ’ = tricuspidal, referring to the aedeagus with the tricuspidal processes.