The British Charipidae, Ibaliidae and Figitidae are revised. The literature on the Cynipoidea is reviewed and is followed by details of methods of collection and preservation. The biology of the three families is summarized. Keys are presented to the families of British Cynipoidea and to the genera and species of the three families. The keys to species are annotated with details of distribution and host information. A check list of the British Charipidae (4 genera and 18 species), Ibaliidae (1 genus and 2 species) Figitidae (12 genera and 25 species) is provided, together with a glossary, 97 text figures, and an extensive list of references.
One new genus (Apocharips), and three new species (Figites ictus, Alloxysta semiaperta and Alloxysta abdera) are described, and two genera and forty species are synonymized. A section on nomenclature includes twenty lectotype designations.