Bamboo,is very important for its value and rapid growth,is mostly cultivated in China.Pyraustinae are severely injurious to bamboo.The external morphology of the last-instar larvae of Algedonis coclesalis（Walker）,Crocidophora evenoralis Walker and Demoboly pervulglis Hampson（all Pyraustini injurious to bamboo） are described and illustrated.Biological information for these larvae is provided.
