Synoeca azurea Saussure, 1852:554, Lectotype ♀, examined (MNHN, Paris), designated by Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:180. - Smith, 1857Smith, F. 1857. Catalogue of Hymenopterous Insects in the Collection of the British Museum. Part V. Vespidae. London. 147 pp. (distribution); Dalla Torre, 1894Dalla Torre, C.G. 1894. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, IX. Vespidae (Diploptera). Guilelmi Engelmann, 181. (distribution); Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:180 ( listed as synonym of Synoeca cyanea (Fabricius, 1775)).
Synoeca violacea Saussure, 1852:555, Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:180, Holotype ♀, examined (MNHN, Paris). - Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:180 ( listed as synonym of Synoeca cyanea (Fabricius, 1775)).
Synoeca ultramarina Saussure, 1854:554, Lectotype ♀, examined (MNHN, Paris), designated by Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:180. - Richards, 1978Richards, O.W. 1978. The social wasps of the Americas excluding the Vespinae. British Museum (Natural History), London. 1-567.:180 ( listed as synonym of Synoeca cyanea (Fabricius, 1775)).