Chrysotimus hubeiensis Wang, Chen & Yang

Wang, Mengqing, Chen, Hongyin & Yang, Ding, 2012, Species of the genus Chrysotimus Loew from China (Diptera, Dolichopodidae), ZooKeys 199, pp. 1-12 : 9-11

Chrysotimus hubeiensis Wang, Chen & Yang sp. n. Figs 7-8

Diagnosis.

Acr 4-5 irregularly paired. Hind tarsomere 1 with 4-5 short and thick black ventral bristles at base. Epandrium apically with short and wide lateral process, acute apically.

Description.

Male. Body length 2.5-2.7 mm, wing length 2.4-2.6 mm.

Head metallic green with gray pollen; frons and face brilliant. Hairs and bristles on head yellow. Ocellar tubercle weak, with 2 very long oc and 2 very short posterior hairs. Lower postocular bristles (including ventral hairs) pale. Antenna blackish; first flagellomere (Fig. 7) blackish, rather short, about 0.6 times as long as wide; arista dorsal, with basal segment very short. Proboscis brown, with brown hairs; palpus pale yellow, with pale hairs and 2 pale yellow apical bristles.

Thorax metallic green with pale gray pollen, mesonotum and scutellum brilliant. Hairs and bristles on thorax yellow; 6 dc, 4-5 irregularly paired acr short and hair-like; scutellum with 2 pairs of bristles. Propleuron with 1 brown bristle on lower portion. Legs including coxae yellow with 5th tarsomeres brown. Hairs and bristles on legs dark yellow; coxae with yellowish hairs and bristles; fore coxa with 6-7 anterior and apical bristles, mid coxa with 2-3 anterior and apical bristles, hind coxa with 1 brown outer bristle near middle. Mid femur with 1 av apically; hind femur with 1 short av and 1 short pv apically. Mid tibia with 2 ad and 2 pd, apically with 3 bristles; hind tibia with 2 ad and 1 pd, apically with 3 bristles. Hind tarsomere 1 with 4-5 short and thick black ventral bristles at base. Relative lengths of tibia and 5 tarsomeres of legs. LI 4.5: 2.3: 1.2: 0.9: 0.6: 0.7; LII 6.2: 3.4: 1.4: 1.0: 0.5: 0.5; LIII 6.8: 2.8: 1.8: 1.2: 1.0: 0.6.

Wing hyaline; veins brownish, R4+5 and M parallel apically; CuAx ratio 0.3. Squama dark yellow with brown hairs. Halter pale yellow.

Abdomen metallic green with pale gray pollen, dorsum brilliant, sterna 1-2 yellow. Hairs and bristles on abdomen brown.

Male genitalia (Fig. 8) dark brown: Epandrium distinctly longer than wide, apically with short and wide lateral process, process acute apically; surstylus slender and finger-like; cercus short and thick, with round apex.

Female.

Unknown.

Type material.

Holotype ♂, Hubei: Shennongjia, Dalongtan pound (31°75'N, 110°67'E), 1.VII.2009, Qifei Liu. Paratypes, 5♂♂, same data as holotype. Type specimens are stored in 75% ethanol.

Distribution.

Known only from the type locality in Hubei.

Remarks.

This new species is similar to Chrysotimus lijianganus Yang & Saigusa, but may be separated from the latter by 2 pd on hind tibia, 4-5 black ventral bristles on hind tarsomere 1, and slender, finger-like surstylus. In Chrysotimus lijianganus , the hind tibia has 1 pd, hind tarsomere 1 has 7-8 black ventral bristles at base, and the surstylus is very wide ( Yang and Saigusa 2001b).

Etymology.

The specific epithet derives from the type locality Hubei.