Contents: Editor's preface, Author's preface, Systematic list of species, Introduction, General, Structure, Determination of species, Development, Copulation, Oviposition, Ova, Habits food, Maternal care, Geographical distribution, literature, Table of families, Apachyidae, Pygidicranidae, Labiduridae, Labiidae, Forficulidae, Species of uncertain position, Appendices- A. On collecting and preserving earwigs, B. List of authors, and Abbreviations, C. Glossary, Index, Explanaation of plates.