Polistes flavicans Fabricius, 1804:276, sex not indicated.America meridionali (Mus. Dom. Lund, leg. Smidt); Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:287, Type ? ♀ (UZM, Copenhagen). - As Mischocyttarus flavicans: - Silveira et al., 2008Silveira, O.T., S.V. da Costa Neto & O.F.M. da Silveira 2008. Social wasps of two wetland ecosystems in brazilian Amazonia (Hymenoptera, Vespidae, Polistinae). Acta Amazonica 38 (2):333-344. (distribution). - As Mischocyttarus flavicans flavicans: - Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567. (distribution).
Megacanthopus goeldii Ducke, 1905:690, Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:287, Type ♀ (depository unknown). - Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:287 ( listed as synonym of Mischocyttarus flavicans (Fabricius, 1804)).
Clypeopolybia duckei Brèthes, 1923 Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:287, Holotype ♀, examined (Mus. nac. Buenos Aires). Synonymized with Mischocyttarus flavicans (Fabricius, 1804) by Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:287.