Genus Zethus Fabricius, 1804

Zethus Fabricius 1804: 282 . Type species: “ Zethus coeruleopennis Fab. ” [= Vespa coeruleopennis Fabricius, 1798].

Didymogastra Perty, 1833: 144 . Type species: Didymogastra fusca Perty, 1833 .

Heros de Saussure, 1856: 115 . Type species: Zethus gigas Spinola, 1841 [= Vespa coeruleopennis Fabricius, 1798].

Wettsteinia Dalla Torre, 1904: 10, 13, pl. 2 fig. 5. Type species: “ Zethus sichelianus de Saussure ” [= Labus sichelianus de Saussure, 1875].

Euzethus Dalla Torre, 1904: 14 . Type species: Vespa coeruleopennis Fabricius, 1798 .

Laboides Zavattari, 1912: 65, division of genus Zethus Fabricius. Type species: Labus sichelianus de Saussure, 1875 .