中国西南地区蠛蠓属四新种描述（双翅目：蠓科）

DESCRIPTION OF FOUR NEW SPECIES OF LASIOHELEA (DIPTERA: CERATOPOGONIDAE) FROM SOUTHWEST CHINA

本文描述了采自中国西南地区的蠛蠓属Ｌａｓｉｏｈｅｌｅａ４新种，分别是采自四川的细小蠛蠓Ｌ．ｐａｒｖｉｔａｓ，ｓｐ．ｎｏｖ．、竹林蠛蠓Ｌ．ｂｏｍｂｕｓａ，ｓｐ．ｎｏｖ．，采自云南的山栖蠛蠓Ｌ．ｏｒｅｉｔａ，ｓｐ．ｎｏｖ．及采自西藏的孟氏蠛蠓Ｌ．ｍｅｎｇｉ，ｓｐ．ｎｏｖ。模式标本保存于北京医学昆虫标本馆。

This new species somewhat resembles Lasiohelea caesariata Debenham and La.longineura Saunders, but distinctly different from the allied species in the following characters: The maxillary palp without sensory pore; the aedeagus provided with slender hook-likeapical process.Holotype ♂, light trap: Leshan(29. 6°N., 103. 7°E. ), Sichuan Province. 5-Ⅷ1978, collected by Yu Yixin.2. Lasiohelea hombea, sp. nov. (fig. 2)The male of this new species is somewhat allied to Lasiohelea uncusipenis Yu et Zhang,but distinctly different in AR and aedeagus.Holotype ♀, allotype ♂, Changning(28. 6°N., 104. 9°E. ) Sichuan Province. Ⅷ1978, Collected by Yu Yixin.3. Lasiohelea oreita, sp. nov. (fig. 3)This new species is somewhat related to Ansfohelea humilavolita Yu et Liu, but thisspecies is larger, and different from the related species in the abdominal segment 8 of femalewithout bat-like scleronization on sternite.Holotype ♀, Nujiang (25. 8°E., 98. 8°E. ) and paratype 1 ♀ from Xichou (23. 4°N.,104. 6°E. ), Yunnan Province. 4-IV-1989, collected by Liu Jinhua.4. Lasiohelea mengi, sp. nov. (fig. 4)This species is closely similar to Lasiohelea mixta Yu et Liu, but they are quite distinctive from each other in maxillary segment 3 and buccal armature of female.Holotype ♀, Taizhong moutain, Cona(2800～3000m alxitude).Allotype ♂ and paratypes 1 ♀ 3 ♂♂, Songdiuluo River, Cona(27. 9°N., 91. 4°E. ).19-V-1988, collected by Liu Kangnan.All types are deposited in the Medical Entomoloty Collected Gallery, (20 Dongda ne,Fengtai, Beijing 100071, China).