"This book demonstrates a complete revision of the family, offering a pattern to follow when preparing any coleopterological treatise." -- Prof Gleb S. Medvedevof the Russian Entomological Society. A new classification of the poorly-known mycetoxylophilous beetle family Tetratomidae is advanced in the scope of the world fauna. Detailed descriptions and accounts are given, and keys are presented both to adults and larvae, so far as known. Numerous taxonomic novelties are proposed.