The genus Synona Pope (1989) (Coleoptera: Coccinellidae: Coccinellini) is revised, with particular reference to the Oriental and Australasian species complex widely identified as S. melanaria (Mulsant, 1850), the type species. It is concluded that the name S. melanaria ought to be applied to the species currently known as S. seminigra (Weise, 1902) and a lectotype is designated for S. melanaria. Synona seminigra (Weise, 1902) is synonymised with S. melanaria (new synonym). Coccinella cassidoides Montrouzier, 1857 (not C. cassidoides Donovan, 1798), and Harmonia anthracina Iablokoff-Khnzorian, 1982 are reduced to junior synonyms of S. melanaria (Mulsant, 1850) (new synonyms). Synona melanopepla (Mulsant, 1850), distributed in the Indian subcontinent and hitherto considered as a synonym of S. melanaria, is recognized as a valid species (status revived). Synona rougeti (Mulsant, 1866), Lemnia melanoptera lablokoff-Khnzorian, 1978, and Lemnia (Synia) martini lablokoff-Khnzorian, 1984 are synonymised with S. melanopepla (new synonyms). Three new species are described: S. obscura sp. nov. (India), S. consanguinea sp. nov. (China, Taiwan, Thailand, Vietnam), S. philippinensis sp. nov. (Philippines). A key to the species is provided, along with biological information wherever available. Coelophora vidua Mulsant, 1850 is synonymised with Coelophora inaequalis (Fabricius, 1775) (new synonym).
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