With over 55,000 species described worldwide andover 1,000 of these recorded in Britain and Ireland,the Staphylinidae represent one of the most speciesrich families in the animal kingdom. Illustrated keysare provided for the identification of the subfamilies ofBritish Staphylinidae. Five subfamilies, Oxyporinae,Steninae, Euaesthetinae, Pseudopsinae, Paederinae,Staphylininae are covered in full in this volume.