By rearing experiment of a life cycle(egg,larva,pupa,adult)on cowpea,the study describes the life habits and morphological character of L.huidobrensis.The life cycle of the L.huidobrensis in(25±1)℃,RH75%~85%,14h light is16~17days.Adult can eat in both the surface and the superfi-cies inferia of the leaf.The larva aliments palisade tissue or spongy tissue can not be clearly distin-guished.