A guide to the ant genera of monsoonal Australla, published as a companion volume to Alan Andersen's The Ants of Southern Australia. Ants are one of the most important faunal groups in Australia, and are widely used as bioindicators in land monitoring and assessment programs. The purpose of the book is to facilitate the identification of the 1500 or so ant species occurring in monsoonal Australia, which encompasses most of the northern third of the continent. The book features original analyses of genera at the species-group level, and so has relevance throughout Australia. It treats all major species that have been described, as well as numerous others that remain undescribed.