The genus Amphiacusta (Grylloidea, Phalangopsidae, Amphiacustae), as defined as a monophyletic entity by DESUTTER-GRANDCOLAS (1993), is revised. Amphiacusta annulipes, A. bahamensis and A. caraibea are redefined. Two species are transferred to other genera : A. dispar to Aclodes, and A. spectrum to Nemoricantor, while Amphiacusta aranea is synonymized with A. annulipes. Twenty new species are described and seven species groups defined. The distribution of the genus and of the species groups are briefly documented.