The species of Rodatus Mulsant are revised and illustrated. The following new synonyms are proposed: Rodatus bakewellii Crotch, 1874 [= Rodatus australis (Blackburn, 1889); Rodatus depressus Weise, 1895; Rhizobius subaustralis Blackburn, 1895]; Rodatus boucardi Crotch, 1874 [= Rodatus major (Blackburn, 1889); Rodatus crotchi (Blackburn, 1895)]. The lectotypes are designated for: Rhizobius australis Blackburn, Rhizobius crotchi Blackburn, Rhizobius discolor var.? proprius Blackburn, Rhizobius major Blackburn, Rhizobius nigronotatus Blackburn, Rhizobius ornatipennis Blackburn, Rhizobius subaustralis Blackburn. The following new species are described: Rodatus tasmanicus, R. marginalis, R. chaetonotus. The species of Rodatus are diagnosed and keyed. Nomenclatural history and distribution are provided for each species.