Abstract
A key to the fully grown larvae of 11 species of Phycitinae is given. Of these, the following eight are known in Britain either as stored-products pests or associated with imported food:—Ephestia elutella(Hb.),Anagasta kuehniella(Zell.),Cadra cautella(Wlk.),C. calidella(Gn.),C. figulilella(Gregson),Plodia interpunctella(Hb.),Mussidia nigrivenellaRag. andEctomyelois ceratoniae(Zell.). The key is preceded by a brief account of the economic importance of these species in Britain.The other three species areEctomyelois decolor(Zell.),E. muriscis(Dyar) andParamyelois transitella(Wlk.). Although these are native to the Americas and are unknown in Britain, they comprise, together withE. ceratoniae, the economically important species formerly of the genusMyeloisHuebner.The larvae ofMussidia nigrivenella, P. transitellaand of the three species ofEctomyeloisare described.

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