A comprehensive english-language reference work on morphology, physiology and development of the moths and butterflies of the world. Written by a truly international team of specialists, the overall level of expertise of the book is unsurpassed, and several chapters present substantial amounts of original information. The book is richly illustrated, and all chapters have extensive bibliographies. Volume I has been published in 1998 and covers the evolution, systematics and biogeography of Lepidoptera. The goal of both volumes is to provide an overview of the current state of knowledge of this outstandingly important insect group.