Neurigona wui Wang, Yang and Grootaert

Wang, Mengqing, Yang, Ding & Grootaert, Patrick, 2007, Notes on the Neurigona Rondani (Diptera: Dolichopodidae) from Chinese Mainland, Zootaxa 1388, pp. 25-43 : 35-36

Neurigona wui Wang, Yang and Grootaert , sp. nov.

( Figs. 14–16 )

Diagnosis. Seven strong dc bristles, 8–9 irregularly paired acr bristles. Tarsomere I1 slightly shorter than tibia I, with 5–6 short v bristles; tarsomere II1 with 1 ad bristle and 4–6 short black v bristles; tarsomeres III1–3 each with row of short v bristles, tarsomere III4 with 5 short v bristles, tarsomere III5 with 1–2 short v bristles.

Description. MALE. Body length 4.5 mm, wing length 3.8 mm.

Head metallic green with pale gray pollen; face narrow, eyes contiguous on median portion of face. Hairs and bristles on head black; postocular bristles pale. Antenna yellow ( Fig. 15 ); first flagellomere about as long as wide, somewhat acute apically; arista brownish with basal segment 0.1 times as long as apical segment. Proboscis brownish yellow with pale hairs; palp pale yellow, with pale hairs and 2 brownish apical bristles.

Thorax yellow with yellow pollen; scutellum and metanotum yellow; pteropleuron with a small black spot just below wing base. Hairs and bristles on thorax black, but those on pronotum and propleuron yellow; 7 strong dc bristles, 8–9 irregularly paired acr bristles. Propleuron with 1 yellow bristle on lower portion. Legs yellow; coxae I–III yellow; tarsi I–III brownish. Hairs and bristles on legs black. Coxa I with yellow hairs and 4–6 yellow bristles on apical portion; coxa II with yellow hairs and 4 yellow bristles apically; coxa III with 1 black outer bristle near middle. Tibia II with 3 ad bristles, 2 pd bristles, and 2 pv bristles, apically with 3 bristles; hind tibia with 2 ad bristles, 1 pd bristle, and 3 v bristles, apically with 4 bristles. Tarsomere I1 shorter than tibia I, with 5–6 short v bristles; tarsomere II1 with 1 ad bristle and 4–6 short black v bristles; tarsomeres III1–3 each with row of short v bristles, tarsomere III4 with 5 short v bristles, tarsomere III5 with 1–2 short v bristles. Relative lengths of tibia and 5 tarsomeres of legs LI 7.2: 5.2: 2.9: 2.0: 1.0: 0.6; LII 6.0: 9.8: 3.4: 2.4: 1.4: 0.7; LIII 14.0: 4.0: 4.6: 2.6: 1.9: 0.8.

Wing ( Fig. 14 ) hyaline; veins black, M1+2 gently bent apically and convergent with R4+5; CuAx ratio 0.5. Squama yellow with pale hairs. Halter yellow.

Abdomen yellow with yellow pollen; terga 2–5 each with a large black basal spot; hypopygium shiny black. Abdominal segment 5 with brown ventral projection. Hairs on abdomen chiefly black.

Genitalia ( Fig. 16 ). Epandrium somewhat round, basally with 2 slender processes. Surstylus with dorsal lobe short and wide, basally with long process; ventral lobe long and wide with acute apex, with thick projection at middle. Cercus somewhat rectangular.

FEMALE. Body length 5.2 mm, wing length 4.4 mm. Similar to male, but scape with thin dorsal hairs, first flagellomere about 1.5 times as long as wide, coxa II with brownish hairs and black bristles, and abdominal segment 5 without ventral projection.

Type material. Holotype male, Zhejiang: Kaihua, Gutianshan, 22. VII. 1992, HW. Paratype 1 female, same data as holotype. Holotype and paratype deposited in CAU.

Distribution. Known only from the type locality in Zhejiang.

Etymology. The specific epithet derives from the collector Hong Wu (Zhejiang).

Comments. The species is similar to Neurigona henana sp. nov., but can be separated from the latter by the coxa II with the yellow hairs and yellow apical bristles, and the somewhat rectangular cercus without the long dorsal apex. In N. henana , the coxa II has the black hairs and bristles, and the wide cercus has the long and thin dorsal apex.

Figures

FIGURES 14 – 16. Neurigona wui sp. nov. Male. 14. Wing; 15. antenna; 16. genitalia, lateral view.