Platypalpus hebeiensis, Yang, Ding & Li, Weihai, 2005

Yang, Ding & Li, Weihai, 2005, New species of Platypalpus from Hebei province, China (Diptera: Empididae), Zootaxa 1054, pp. 43-50 : 44-45

1. Platypalpus hebeiensis n. sp.

( Figs. 1–4 )

Diagnosis. 1 vt. Antenna dark yellow except apex of first flagellomere blackish; first flagellomere 2.3 times longer than wide. acr biseriate. Mid tibia with long, acute, apical spur. Tarsomeres 1–5 each with black apical annulation. R4+5 and M convergent apically.

Description. Male. Body length 2.9 mm, wing length 3.4 mm.

Head black with dense pale gray pollen; tinged with yellow on vertex. Eyes narrowly separated on face; face slightly narrower than frons. Hairs and bristles on head pale. Ocellar tubercle with 2 oc and 2 posterior hairs; 1 vt. Antenna dark yellow except apex of first flagellomere blackish; scape without dorsal bristles; pedicel with circlet of pale subapical bristles; first flagellomere long conical, 2.3 times longer than wide; arista 2.2 times as long as first flagellomere, black, indistinctly pubescent. Proboscis shining black with sparse pale hairs; palpus yellow with pale hairs and 1 pale apical bristle.

Thorax black with dense pale gray pollen; pollen on mesonotum and scutellum tinged with yellow; sternopleuron with a large shining black spot. Thorax with pale hairs and bristles; 1 h curved inward, 2 npl, acr biseriate and separated from lateral hairs by bare band, only 1 short posteriormost dc present, 1 long presc longer than dc, 1 psa; scutellum with 2 pairs of sc. Legs brownish yellow except tarsomeres 1–5 each with black apical annulation, which is wider on tarsomere 5. Hairs and bristles on legs pale. Fore and mid femora distinctly thickened, fore femur 1.6 times and mid femur 1.9 times as wide as hind femur; mid femur with two rows of black short v and one row of short av and long pv; mid tibia somewhat curved, with row of black thin v and long acute apical spur. Wing hyaline; veins dark yellow; first basal cell shorter than second basal cell, distance between r­m and m­m equal to length of m­m; R4+5 and M convergent apically. Squama yellow with pale hairs. Halter yellow.

Abdomen dark brownish yellow with pale gray pollen; hypopygium black. Hairs on abdomen pale. Male genitalia ( Figs. 2–4 ): Left and right epandrial lamellae narrowly connected basally; left epandrial lamella with two rows of long dense hairs at outer margin, surstylus not distinctly separated, wide and obtuse apically; right epandrial lamella with row of long apical hairs, surstylus finger­like; left cercus nearly as long as right cercus, thick and obtuse apically, right cercus thick and obtuse apically.

Female. Unknown.

Holotype male, Hebei: Yuxian, Xiaowutai National Nature Reserve, Chiyanbaogou, 2004. V. 29, Xingyue Liu (CAU).

Etymology. The species is named after the region of its origin, Hebei.

Remarks. The new species is similar to P. henanensis Yang, An and Gao from Henan, but can be separated from the latter by the mid tibia with 1 long spine­like apical spur and vertex with 1 vt. In P. henanensis , the mid tibia has a long finger­like apical spur with small apical hook, and the vertex has 2 vt (Yang, An & Gao, 2003). The new species belongs to the P. pallidiventris­cursitans species group.

Figures

FIGURES 1 – 4. Platypalpus hebeiensis sp. n., male. 1. Spur on mid tibia; 2. genitalia, dorsal view; 3. right surstylus; 4. left epandrial lamella.