Four new species of the genus Delia Robineau-Desvoidy in the Yunnan Province of China (Diptera, Anthomyiidae) Author Du, Jing Author Xue, Wanqi text ZooKeys 2017 693 141 153 http://dx.doi.org/10.3897/zookeys.693.12965 journal article http://dx.doi.org/10.3897/zookeys.693.12965 1313-2970-693-141 5A07733F6A4E4CABAA763EBB370F4B60 5A07733F6A4E4CABAA763EBB370F4B60 Delia nigerihalteres sp. n. Figure 3 Type material. Holotype. China, Yunnan Province, Baimang Snowberg, 4100 m, 30 May 2007, Dandan Wang Co., ♂(IESNU). Paratype. China, same data as holotype, 3♂♂. Diagnosis. Frons 1.5 times wider than anterior ocellus; without orbital setae; 6-7 pairs of frontal setae; arista ciliated, longest hair longer to 1.5 times basal diameter; anterior margin of gena with 3-4 rows of upcurved subvibrissal setulae; parafacial 1.2 times wider than antenna; prementum approx. 2.5-3.0 times longer than broad; costa setulose only basally on ventral surface; legs black; mid tarsomere 2 without protuberance; all tergites with broad trapeziform spots in centre, posterior marginal setae and lateral setae strong; inner side of 5th sternite processes without protrusion. Figure 3. Delia nigerihalteres sp. n. A male, 5th sternite in ventral view; B. male, terminalia in posterior view; C. male, terminalia in profile; D. male, aedeagus in profile; E. male, distal part of aedeagus in anterior view. Description. Holotype male. Body length 3.0-3.5 mm. Head. Eye bare; frontal vitta black, 1.5 times as wide as fronto-orbital plate; frons 1.5 times wider than anterior ocellus; frontal vitta with a pair of interfrontal setule; without orbital setae; 6-7 pairs of frontal setae, situated on lower 3/5 of frons; fronto-orbital plate and parafacial with dark grey dust; parafacial 1.2 times wider than antenna; antenna black, postpedicel approx. 1.5-1.8 times longer than broad; arista ciliated, longest hair longer to 1.5 times basal diameter; lower facial margin slightly projecting, vibrissal angle situated before frontal angle in profile; genal height approx. 1/5 eye height; anterior margin of gena with 3-4 rows of upcurved subvibrissal setulae; prementum shiny, approx. 2.5-3.0 times longer than broad; palpus black, slightly shorter than prementum. Thorax. Black in ground colour with brownish grey dust; scutum with three black vittae; two rows of hair-like prst acr (the second pair 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 subequal to the posterior notopleural; scutellum bare on disc centrally and basally; katepisternals 1+2. Wing. Base and veins fuscous, basicosta black; costa setulose only basally on ventral surface; costal spine absent; radial node bare, squamae brown; lower squama approx. 1/2 length of upper; halter black. Legs. Entirely black; fore tibia with one medial p; mid femur with a complete row of av, becoming shorter apically, a complete row of pv, becoming longer medially; mid tibia with 2-3 pd and two pv; mid tarsomere 1 with row of long pd, subequal to the length of its diameter; hind femur with complete row of av and pv, becoming longer mediately; hind tibia with five av, 5-6 ad, 2-3 pd, and 8-9 pv; all tarsi shorter than tibiae, claws slightly longer than pulvilli, pulvilli approx. 1/2 length of tarsomere 5. Abdomen. Black, flat cone-shaped in dorsal view; all tergites with broad trapeziform spots in centre, posterior marginal setae and lateral setae strong; 6th tergite bare; 1st sternite with fine hairs. Female. Unknown. Remarks. This new species is similar to Delia quadrilateralis Fan & Zhong in Fan et al., 1981 , but differs from it in the following features: male frontal vitta 1.5 times as wide as fronto-orbital plate; frons 1.5 times wider than anterior ocellus; basicosta black ; costal spine absent; squamae brown; halter black; mid tarsomere 1 with row of long pd, subequal to the length of its diameter. Etymology. The specific name is from the Latin word "niger" , black, "halter" , halter, referring to its black halter. Distribution. China, Yunnan Province (Baimang Snowberg).