Homoneura ( Homoneura ) caoi Wang et Yang

Homoneura ( Homoneura) caoi Wang et Yang View in CoL , sp. nov.

( Figs. 12–22 View FIGURES 12 – 17 View FIGURES 18 – 22 )

Diagnosis. acr in 10 somewhat irregular rows. Apical spots on R2+3, R4+5 and M1 separated, extending to extreme vein tip; apical spot on R2+3 with basal edge beyond dm-cu, apical spot on R4+5 with basal edge about same level with that on M1; a spot constricted at middle on dm-cu; apex of subcostal cell hyaline. Male surstylus trifurcated, gonopod with 3 inward curved arc-shaped processes, aedeagus hook-shaped apically.

Description. MALE. Body length 7.6–7.8 mm, wing length 7.7–7.8 mm.

Head ( Fig. 13 View FIGURES 12 – 17 ) yellow. Frons about as long as wide and parallel-sided; ocellar triangle without spot; oc developed, longer than anterior or and slightly shorter than posterior or; face without spots; gena about 1/6 height of eye. Antenna yellow, 1st flagellomere 1.9 times as long as wide; arista dark brown except yellow brownish at base, with longest hairs about as long as the height of 1st flagellomere. Proboscis yellow, with yellowish hairs and slightly dark hairs; palpus yellow, with dark hairs.

Thorax ( Fig. 14 View FIGURES 12 – 17 ) yellow. Mesoscutum with 1 sa, 1 ia, 0+3 dc (anteriormost dc clearly behind transverse scutal suture), acr in 10 somewhat irregular rows, uniformly short hair-like; prsc about as long as anteriormost dc. Mesopleuron with 1 bristle on anepisternum and 2 bristles on katepisternum. Legs yellow. Fore femur with 4–5 pv and 7–8 pd, and ctenidium with 12–13 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 preapical ad and 4 apv. Hind femur with a row of weak av (only 2–3 apical bristles distinct) and 1 preapical ad; hind tibia with 1 weak preapical ad and 1 short apv. Wing ( Fig. 15 View FIGURES 12 – 17 ) tinged yellowish, apical spots on R2+3, R4+5 and M1 separated, extending to extreme vein tip; apical spot on R2+3 with basal edge beyond dm-cu, apical spot on R4+5 with basal edge about same level with that on M1; a spot constricted at middle on dm-cu; apex of 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) sections in proportion of 3.9 mm: 1.1 mm: 0.7 mm; r-m before middle of cell dm; ultimate and penultimate sections of M 1 in proportion of 2.2mm: 2.0mm; ultimate section of CuA1 about 1/6.5 of penultimate. Halter yellow.

Abdomen ( Fig. 16 View FIGURES 12 – 17 ) yellow; tergites 2–5 with very narrow brownish posterior margin. Male genitalia ( Figs. 17– 22 View FIGURES 12 – 17 View FIGURES 18 – 22 ): Protandrium circular; surstylus trifurcated, with long hairs; hypandrium H-shaped; gonopod with 3 inward curved arc-shaped processes; aedeagus hook-shaped apically, with a narrow apical incision; aedeagal apodeme shorter than aedeagus.

Type material. Holotype male ( CAU), CHINA, Sichuan Province: Emei Mountain, Linggongli ( N 29°32', E 103°19', 1270 m), 30. VI. 2010, Junchao Wang. Paratype: CHINA, Sichuan Province: 1 male ( CAU), same data as holotype.

Distribution. China (Sichuan).

Remarks. This species is somewhat similar to H. ( H.) bispinalis from Zhejiang. But it can be separated from the latter by the surstylus trifurcated and the hypandrium H-shaped. In bispinalis , the surstylus is finger-like, and the hypandrium is nearly Y-shaped ( Yang, Hu and Zhu, 2001).

Etymology. The species is named after Dr. Chengquan Cao to express our sincere thanks for his help during the survey in 2010.