Asyndetus wusuensis Wang et Yang

Wang, Mengqing & Yang, Ding, 2005, Xinjiang, with a key to Central Asian species, Zootaxa 892, pp. 1-8 : 4-6

Asyndetus wusuensis Wang et Yang , sp. nov.

( Figs. 4–6 )

Diagnosis. First flagellomere about as long as wide; fore and mid tibiae yellow, hind tibia brown; mid and hind femora each with 2 rows of long v. Sternum 5 with many long black bristles.

Description. Male. Body length 3.1 mm, wing length 2.6 mm.

Head metallic green with pale gray pollen, frons wide, shining metallic green, face wide, about 1.5 times wider than first flagellomere. Hairs and bristles black; ocellar tubercle distinct with 2 strong oc and 2 posterior hairs; lower postocular bristles (including postero­ventral hairs) pale. Antenna black ( Fig. 5 ); first flagellomere about as long as wide, brownish; arista dorsal, brownish, short pubescent, with basal segment rather short. Proboscis dark brown with pale hairs; palpus pale with black hairs and 2 black apical bristles.

Thorax dark metallic green with pale gray pollen. Hairs and bristles on thorax black; 5 strong dc, 6–7 paired acr short and hair­like; scutellum with 2 pairs of bristles (apical pair thick and long, basal pair rather short and hair­like). Propleuron with 1 black bristle on lower portion. Legs metallic green, each femur with brownish apex, fore and mid tibiae and tarsomere 1 (except tip) yellow, hind tibia and tarsus brown, fore and mid tarsi brownish to brown from tip of tarsomere 1 onward. Hairs and bristles on legs black; fore coxa with 8 anterior and apical bristles; mid coxa with 3–4 anterior outer bristles; hind coxa with 1 outer bristle at basal 1/3. Fore femur with 2 rows of 4–6 short v; mid femur with 2 rows of av and pv (those near base longer); hind femur with 2 rows of long ventral bristles on apical 4/5 (longer than width of femur). Fore tibia with 1 ad at middle, 1 pd and 1 v, apically with 4 bristles; mid tibia with 2 ad and 2 pd, apically with 4 bristles; hind tibia with 2 ad, 3–4 pd, and 3–4 short v, apically with 4 bristles. Fore leg without claws; elongated pulvilli of fore leg longer than tarsomere 5; mid and hind legs each with small claws, elongated pulvilli of mid leg about as long as tarsomere 5, pulvilli of hind leg shorter than tarsomere 5. Relative lengths of tibia and 5 tarsomeres LI 5.0: 2.2: 0.9: 0.7: 0.5: 0.5; LII 5.1: 2.7: 1.2: 0.9: 0.6: 0.6; LIII 6.5: 2.0: 1.4: 1.0: 0.8: 0.7.

Wing hyaline ( Fig. 4 ); veins brown, R4+5 and M divergent apically. CuAx ratio 0.1. Squama pale yellow with pale hairs. Halter pale yellow.

Abdomen metallic green with pale gray pollen. Hairs and bristles on abdomen black. Terga 1–5 with row of posterior bristles; sternum 5 with 2 groups of about 25 long black lateral bristles (those are wave­like curved apically), sternum 8 with 4 strong bristles.

Male genitalia ( Fig. 6 ): Lateral lobe on epandrium large, slightly longer than surstylus, with broad base and long acute apex, and with 2 spine­like apical bristles; surstylus straight and curved apically, with 2 pale bristles on apical half, basally with 1 long and straight process; cercus brownish with 2 long apical bristles (those are wave­like curved apically) and some short hairs; aedeagus slender.

Female. Unknown.

Type material. Holotype male, XINJIANG: Wusu, 24. VI. 1957, Ch. Hong (CAU).

Etymology. The specific epithet derives from locality of the holotype Wusu (Xinjiang).

Comments. The new species is similar to Asyndetus barbiventris Stackelberg from Tajikistan in having the long black bristles on sternum 5, but may be separated from the latter by the fore and mid tibiae yellow and the mid femur with 2 rows of v. In A. barbiventris , the fore and mid tibiae are metallic green with the yellow apex, and the mid femur just have one row of av ( Negrobov, 1973).

Figures

FIGURES 4 – 6. Asyndetus wusuensis Wang et Yang, sp. nov. (male). 4. wing, dorsal view; 5. first flagellomere and arista, lateral view; 6, genitalia, lateral view.