Delia tuberisurstyla, Du, Jing & Xue, Wanqi, 2017

Du, Jing & Xue, Wanqi, 2017, Four new species of the genus Delia Robineau-Desvoidy in the Yunnan Province of China (Diptera, Anthomyiidae), ZooKeys 693, pp. 141-153 : 147-150

Delia tuberisurstyla sp. n. Figure 4

Type material.

Holotype. China, Yunnan Province, Yulong Snowberg, Big ropeway, 4571 m, 29 June 2006, Ming-Fu Wang Co., ♂(IESNU). Paratype. China, same data as holotype, 1 ♂.

Diagnosis.

Arista pubescence, longest hairs shorter than its basal diameter; lower facial margin slightly projecting, with anterior margin of frons in same vertical plane; legs black; hind tibia with two rows of pv; inner side of 5th sternite processes with a protrusion.

Description.

Holotype male. Body length 5.5-6.0 mm.

Head. Eye with sparse and short ciliae; frontal vitta black, with black dust; frontal vitta with a pair of interfrontal setule; frons as wide as anterior ocellus; without orbital setae; fronto-orbital plate, parafacial and gena with dark grey dust; 7-8 pairs of frontal setae, situated on lower half of frons; parafacial 1.4 times wider than postpedicel; antenna black, postpedicel 1.5 times longer than broad; arista pubescence, longest hairs shorter than its basal diameter; lower facial margin slightly projecting, with anterior margin of frons in same vertical plane; genal height approx. 2/7 eye height; anterior margin of gena with two rows of upcurved subvibrissal setulae; para-occipital and postgenal hairs black; proboscis slender, prementum with grey dust, approx. 6.0-7.0 times longer than broad; palpus black, subequal to prementum.

Thorax. Black in ground colour with dark grey dust; scutum with three indistinct black vittae; two rows of hair-like prst acr (1 or 2 pairs stronger), only one pair of post acr developed, these situated in front of scutellum, dc 2+3, ial 0+2; notopleural despression bare apart from two strong setae; pra 1.2 times longer than posterior notopleural seta; scutellum bare on disc centrally and basally; katepisternals 1+2.

Wing. Base fuscous, basicosta black; costa setulose only basally on ventral surface; costal spine absent; radial node bare, squamae yellowish; lower squama short, approx. 1/3 length of upper; halter brown-yellow.

Legs. Entirely black; fore tibia with 1(0) medial p; mid femur with seta-like a row in basal half, pv rows complete; mid tibia with one pd and two pv; mid tarsomere 1 with one row of long ad, more than 1.5 times longer than its diameter; hind femur with complete row of av, becoming longer apically; hind tibia with 9-10 av, 5-6 ad, one row of pd (3-4 developed), and two rows of pv, slightly pectinated; all tarsi shorter than tibiae, claws and pulvilli large, slightly shorter than tarsomere 5.

Abdomen. Black, long cone-shaped in dorsal view, with grey or brownish grey dust; all tergites with hair-like setae in middle part, setae becoming longer towards lateral margin, mid black vitta expand in middle part, near rhombic; 6th tergite bare; 1st sternite dense with long fringes.

Female. Unknown.

Remarks.

This new species is similar to Delia subnigribasis Fan & Wang in Fan et al., 1981, but differs from it in the following features: male frontal setae 7-8 pairs; pra 1.2 times longer than posterior notopleural seta; basicosta black; mid tarsomere 1 with one row of long ad, more than 1.5 times longer than its diameter.

Etymology.

The species name is derived from the Latin words “tuber”, tuber, referring to the middle part of surstylus with a sheet-shaped tuber in dorsal view.

Distribution.

China, Yunnan Province (Yulong Snowberg).