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谷类大蚊Nephrotomasp.属于双翅目(D-iptera)大蚊科(Tipuliolae)的一种地下害虫。1980年在北镇县广宁公社首次发现。现将初步观察结果整理如下:
Nephrotomasp. An underground pest belonging to the genus Tipuliolae of the D-iptera. Found in Guangning commune of Beizhen County in 1980. The preliminary observations are now organized as follows: