内蒙古菌蚊二新种及—中国新记录种(双翅目:菌蚊科)

TWO NEW SPECIES OF MYCETOPHILIDS (DIPTERA:MYCETOPHILIDAE) FROM NEI MONGOL

双翅目菌蚊科(Mycetophilidae)是一类成虫生活于阴暗潮湿环境,幼虫多以菌类为食的小型昆虫,一些种类构成对食用菌生产的威胁。内蒙古自治区的菌蚊未见记载。我们在研究作者1978年采自卓资县保安林场的一批标本中,发现有该科昆虫2新种和1中国新记录种,其中光菌蚊属(Acomoptera)为中国新记录属。 本文所提及的模式标本和研究标本均保存于北京农业大学昆虫标本室。

This paper deals with two new species and one new record of Mycetophilidae from Nei Mongol. The types are kept in the Insect Collections of Beijing Agricultural University.1. Acomoptera sinica sp. nov. (Fig. 1)Holotype (?) , Nei Mongol: Zhuozi Co., Bao'an Forestry Station, 23-Ⅷ-1978, coll. Yang Chi-kun.Cercus squarish, with several long setae apically; 3 lobes of gonostylus subequal; tergite 9 with 2 parts. These characters are different from those of A. plexipus (Garrett).2. Mycomya neimongana sp. nov. (Fig.2)Holotype (?) , Nei Mongol: Zhuozi Co., Bao'an Forestry Station, 22-Ⅷ-1978.Coll. Yang Chi-kun.Similar to the western Palaearctic species M. promminens (Lundstron), but the new species has the following characters which separate it from the latter: tergite 9 with 3 sabre-like spines, sternal synsclerite with 4 setae on each side, aedeagus with dense microchaetae. gonostylus with 2 apical teeth.3. Mycomya permixta Vaisanen (Fig.3)Widely distributed in Holarctic region. It is a species new to China.