Delia subnemostylata Xue & Du

Du, Jing & Xue, Wanqi, 2018, A review of the Deliainterflua group with descriptions of two new species (Diptera, Anthomyiidae), ZooKeys 764, pp. 145-154 : 147-148

Delia subnemostylata Xue & Du sp. n. Figure 1

Type material.

Holotype. China, Yunnan Province, Baimang Snowberg, 3800-4200 m, 5 July 2006, Mingfu Wang Co., ♂ (IESNU). Paratype. China, same data as holotype, 3 ♂♂.

Diagnosis.

Frontal setae 4-5 pairs, pra approx. 1.2 times as long as posterior notopleural seta; sternite I with dense long fringes, sternite III with dense long setae; postgonite without setae.

Description.

Holotype male. Body length 5.5 mm.

Head. Eyes only with several short ciliae in lower margin; frontal vitta red brown in lower part, remaining black, 2.0 times as wide as fronto-orbital plate; frons 1.5-2.0 times as wide as anterior ocellus; frontal vitta with a pair of inter frontal setae; without orbital setae; frontal setae 4-5 pairs, situated on lower half; fronto-orbital plate, parafacial with dark gray tomentum, parafacial 1.3 times as wide as postpedicel; antenna black, postpedicel 2.0-2.3 times as long as broad; arista pubescent, the longest aristal hairs shorter than its basal diameter; lower facial margin not projecting, vibrissal angle and frontal angle in the same vertical plane in profile; gena sparsely with dark gray tomentum, genal height approx. 1/4 of eye height; anterior margin of gena with two rows of upcurved subvibrissal setulae; postocular setae extending to ventral surface, epicephalon haired; proboscis short, prementum with gray tomentum sparsely, 2.5 times as long as broad, palpus black, equal to the length of prementum.

Thorax. Ground color black with fuscous tomentum; scutum with three distinct black vittae; with two rows of hair-like prstacr, only one pair of post acr distinctly in front of scutoscutellar suture, dc 2+3, ial 0+2; without outer posthumeral seta; pra approx. 1.2 times as long as posterior notopleural seta; scutellum without spots, lower surface with some pale hairs apically; anterior anepisternal setae absent; notopleuron haired; basisternum of prosternum, anepimeron, meron and katepimeron all bare; both anterior and posterior spiracles small and fuscous; katepisternal seta 1+2.

Wing. Base brown and basicosta fuscous; costa setulose only basally on ventral surface, anterior surface with a row of pectinated spines; costal spine subequal to crossvein r-m; radial node bare, calypters yellowish, lower calypter approx. 2/5 length of upper one; halter yellow.

Legs. Entirely black; fore tibia with 1 submedial ad and 1 medial p; mid femur without distinct av, with 4-5 strong pv in basal half; mid tibia with 1 submedial av, 1 pd and 1 preapical p, without pv; mid tarsomere 1 without distinct setae; hind femur with 7-8 av in distal 2/3 (2 strong), only with distinct pv in distal part; hind tibia with 3 av, 2 ad, 3 pd, and 4-5 pv; all tarsi shorter than tibiae, claws and pulvilli shorter than tarsomere 5.

Abdomen. Black, long flat-shaped(Fig. 1A); tergite 2 slightly longer; all tergites with T-shaped spots, lateral setae and posterior marginal setae developed, tergite VI bare; sternite I with dense and long fringes, sternite III with dense and long setae (Fig. 1B); sternite IV with short setae; sternite V processes (Fig. 1C) longer than base; cercal plate (Fig. 1D) 1.2 times longer than wide, heart-shaped, apex finger-shaped, bearing a few short setae; surstyli 3.0 times length of cercal plate, in lateral view (Fig. 1E) slender; pregonite with two setae, postgonite without setae. Aedeagus as illustrated in Figure 1F, G; acrophallus longitudinally directed, supported by a sclerotized bridge between the bases of the free paraphallic processes, the sclerotized bridge is prolonged downwards, forming a membranous process.

Female. Unknown.

Remarks.

This new species is similar to D. nemostylata Deng & Li, 1984 as it has very similar genitalia, but differs from it for its frontal setae 4-5 pairs, katepisternal seta 1+2; lower calypter approx. 2/5 length of upper one; fore tibia with one submedial ad and one medial p; mid tibia without pv; hind tibia with two ad and three pd.

Etymology.

This new species is similar to D. nemostylata Deng & Li, 1984. Hence, its epithet is derived to reflect this relationship.

Distribution.

China, Yunnan Province (Baimang Snowberg).