Two new species of the genus Helina (Diptera: Muscidae) from Sichuan, China

In the present paper five new species of the genus Helina from Sichuan Province, China are describcd, namely H. aureolicolorata, sp. nov.; H. plumipostitibia, sp. nov.; H. maowenna, sp. nov.; H. hyeta, sp. nov.; H. mimintermedia, sp. nov.. All materials are deposited in the Medical Entomological Collection, Institute of Microbiology and Epidemiology, AMMS, Beijing, China. 1. Helina aureolicolorata, sp. nov. (Figs.1～3) ♂: Body length 8.0 mm. This new species is closely related to Helina annosa (Zetterstedt, 1838), but differs from the latter in: Body yellow brownish; hypopleura with yellow hairs on lower of poststigma; hind tibia with av bristle which not end broken; male cerci concave in inward on both sides in posterior view. ♀: Unknown. Holotype ♂, Ya'an (Mt. Zhougong, 1700 m; 29°58′N,102°59′E), Sichuan Prov., 24 Ⅵ 1985, Coll. by Feng Yan. 2. Helina plumipostitibia, sp. nov. (Figs.4～7) ♂: Body length 8.0 mm～9.5 mm; body and leg black. This new species is closely related to Helina nigriannosa Xue and Zhao, 1989, but differs from the latter in: Thorax on dorsal surface with inner lateral stripe not reaching scutellum sulcus; 1st sternite with hairs; male surstyli longer than cerci in lateral view; cerci blunt round on apical part. ♀: Body lenth 8.0 mm. Frons wider than 1/3 head width (0.4118); inward ori 4, backward ori 2; frontal triangle not reaching frontal margin; hind tibia with av 3, ad 2; abdomen on 3rd and 4th tergites with deform spots, without lateral spot; pra absent. Holotype ♂, Ya'an (Mt. Zhougong), Sichuan Prov., 08 Ⅺ 1985, Coll. by Feng Yan; paratypes: 1♂, same collector and locality as holotype; 3♂♂, Hanyuan (Mt. Tuanbao, 2800 m; 29°23′N, 102°52′E), Sichuan Prov., 10 Ⅶ 1988; 3♂♂1♀, Hanyuan (Mt. Jiaoding, 3552 m; 29°23′N, 102°51′E), 11 Ⅶ 1988, above all Coll. by Feng Lifu; 2♂♂ Hanyuan (Mt. Jiaoding), 24 Ⅵ 1987, Coll. by Yang Shibin; 2♂♂, Mt. Erlang (Forest Farm, 2760 m; 29°54′N,102°08′E). Sichuan Prov., 01 Ⅶ 1988; 1♂, Kangding (Mt. Paoma, 2900 m; 30°07′N,101°58′E), Sichuan Prov., 21 Ⅸ 1982, above same collector as holotype. 3. Helina maowenna, sp. nov. (Figs.8～10) ♂: Body length 7.2 mm. This new species is closely related to Helina spinicauda Xue et Wang, 1986, but differs from the latter in: Frons about 2.5 times as width as frontal ocellus; 5th tergite without long bristle; male cerci of both piece largely healed in posterior view; sustyli as long as cerci in lateral view. ♀: Unknown. Holotype ♂, Maowen (Cibusuyabazhai, 2300 m; 30°06′N, 103°09′E), Sichuan Prov., 22 Ⅷ 1983, coll. by Qiao Xueron. 4. Helina hyeta, sp. nov. (Figs.11～13) ♂: Body length 7.5 mm; body and leg black dark. This new species is closely related to Helina minutideleta Xue, Li et Wang, 1994, but differs from the latter in: Frons about 1.7 times as width as frontal ocellus; mid femur with a row of complete pv bristles which mixed with end broken ones; abdomen on dorsal surface with lateral spots distinctly; lateral lobe of 5th sternite too far apart on each other in ventral view. ♀: Unknown. Holotype ♂, Kangding (Mt. Paoma), Sichuan Prov., 10 Ⅶ 1986, coll. by Feng Yan; paratype 1♂, Mt. Erlang (Forest Farm), Sichuan Prov., 21 Ⅷ 1986, same collector as holotype. 5. Helina mimintermedia, sp. nov. (Figs.14～17) ♂: Body length 6.5 mm～7.5 mm; body and leg black. This new species is closely related to Helina subintermedia Fang et Fan, 1992, but differs from the latter in: Thorax on dorsal surface with four black stripes distinctly; mid femur without long fringe on ventral surface; 2nd and 5th tergites with a piar of ellipse fuscous spots on dorsal surface; male surstyli broad plank like and backward curved on apical part in lateral view. ♀: Unknown. Holotype ♂, Mt. Erlang (Forest Farm, 2690 m), Sichuan Prov., 24 Ⅷ 1984, coll. by Feng Yan; paratype 1♂, 08 Ⅶ 1986, same collector and locality as holotype.