A complete handbook providing an extensive introduction to the biology, ecology and behaviour of the Zygaenidae. The introduction provides detailed information on zygaenid systematics and phylogeny, life cycles, morphology, zoogeography and palaeontology, genetics and individual variation, ecology and behaviour, conservation, collecting and breeding techniques. In the systematic part of the book, the 115 species of westen Palaearctic Zygaenidae, currently contained in the three subfamilies Procridinae, Chalcosiinae and Zygaeninae, are treated. Each species is briefly described, followed by differentiating characters of similar species, individual and geographical variation, distribution (with maps for each species), ecology, behaviour, early instars and larval foodplants. Colour plates illustrate all species and the male and female genitalia of the Procridinae are also figured. A bibliography provides references to the most relevant literature for those interested in current research.