The genera Scymnodes Blackburn, 1889 and Apolinus Pope et Lawrence, 1990 (Coleoptera: Coccinellidae), endemic to Australia and New Guinea, are revised. Fifteen species of Scymnodes are treated of which seven are new (S. howdenorum sp. nov., S. luteohirtus sp. nov., S. aciculatus sp. nov., S. metallicus sp. nov., S. magnus sp. nov., S. riedeli sp. nov. and S. hirtus sp. nov.). Scymnodes koebeli var. immaculatus Blackburn, Platyomus baccaeformis Blackburn, Scymnodes (Dolinus) maculiger Weise, Scymnodes koebeli var. eugeniae Blackburn, Scymnodes (Dolinus) tristis Weise, and Scymnodes (Dolinus) fulvipes Weise, are new junior synonyms of Scymnodes koebelei Blackburn (new synonyms). Lectotypes are designated for Scymnodes koebeli var. eugeniae Blackburn, Scymnodes (Dolinus) tristis Weise, and Scymnodes (Dolinus) fulvipes Weise. Rhizobius laticollis Weise, 1913 is transferred to Scymnodes (new combination) and its lectotype is designated. Seven species of Apolinus are recognised, of which two are new (A. irian sp. nov., A. jaya sp. nov.). Scymnodes chapuisi Weise, 1923 is a new junior synonym of A. lividigaster (Mulsant, 1853) and Scymnodes spilotus Weise (1923), Scymnodes papuanus Weise (1918), and Scymnodes punctiger Weise (1918) are new junior synonyms of A. terminalis (Blackburn, 1895) (new synonyms) and lectotypes are designated for all these species. Scymnodes longicornis Weise, 1918 is transferred to Apolinus (new combination) and a lectotype is designated. Rhynchortalia wallacii Crotch, 1874 is transferred to Apolinus (new combination) and is reduced to a subspecies of A. lividigaster (stat. nov.). All the species are described, illustrated, and keyed. Biological information is provided if available.
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