This Naturalists' Handbook aims to attract more people to the study of solitary wasps by describing the ecology, distribution and natural history of these insects, including all relevant research in one convenient volume. Contents include an overview of the natural history of the solitary wasp, guidelines on identification, and advice on techniques and approaches to study. Further reading, a systematic checklist of genera and an alphabetical checklist of species and their distributions are included. Detailed keys to the identification of the species form the centre of the book and the text is accompanied by clear illustrations throughout, making this an invaluable practical guide for anyone seeking to broaden their knowledge of these fascinating, diverse creatures. This book is a digital reprint of ISBN 0-85546-255-8 (1993). Naturalists' Handbooks encourage and enable those interested in natural history to undertake field study, make accurate identifications and to make original contributions to research.