Abstract: One new blackfly, Simulium (Gomphostilbia) laoshanstum sp.nov.were described on the female, male, pupal and larval specimens collected from Laoshan, Qingdao, Shandong province, China.All the specimens are kept in the Medical Entomology Collection Gallery, Academy of Military Medical Sciences, Beijing.This new species closely related to S.(G.) pingxiangense An and Hao, 1990 from Pingxiang, Guangxi province, China and S.(G.) ela Davies, 1987 from Sri Lanka and S.(G.) sundaicum Edwards, 1934 from East Java, however, it is clearly different from S.(G.) pingxiangense An and Hao, 1990,S.(G.) ela Davies, 1987 and S.(G.) sundaicum Edwards, 1934 by the structure of gonapophysis, genital fork, cibarium of the female and median sclerite, paramere of the male, by the branching of the pupal respiratory filaments and form of postgenal cleft in the mature larvae.Holotype ♀, paratype 3♂, 4 pupa, 3 mature larvae, Qingdao Laoshan, Shandong, 45m(36.3°N, 120.5°E) 18 May,1994.

摘要： 作者于1994年5月中旬，在山东青岛崂山采集一些蚋科标本，经整理鉴定为4种蚋。其中亮胸蚋Simulium（Simulium）nitidithorax Puri，1932为我国已知种，在西藏、海南、福建均有记载；S．（Nevermannia）sp．和S．（Eusimulium）sp．为待定种；崂山绳蚋S．（Gomphostilbia）laoshanstumsp．Nov．是一新种。该新种与S．（G．）pingxiangense An and Hao，1990、S．（G．）elaDavies，1987和S．（G．）sundaicum Edwards1934蚋种相似，但生殖叉突、食窦、生殖叉骨、阳茎基侧突、呼吸丝和幼虫后颊裂等有明显不同。

关键词: 双翅目, 蚋科, 蚋属, 绳蚋亚属, 新种