Stephanus furcatus Lepeletier, 1825:489 - Dalla Torre, 1901-1902Dalla Torre, C.G. 1901-1902. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. — Volumen III: Trigonalidae, Megalyridae, Stephanidae, Ichneumonidae, Agriotypidae, Evaniidae, Pelecinidae. Pars II. Breitkopf & Härtel, Leipzig. VIII + 1141. (distribution). - As Megischus furcatus: - Aguiar, 2004Aguiar, A.P. 2004. Additions to the revision of the genus Hemistephanus Enderlein (Hymenoptera: Stephanidae), with inclusdion of four taxa and description of two new species. Papéis Avulsos de Zoologia 44 (2):13-43.:36 (listed).
Stephanus Brasiliensis Westwood, 1832:403 - Aguiar, 2004Aguiar, A.P. 2004. Additions to the revision of the genus Hemistephanus Enderlein (Hymenoptera: Stephanidae), with inclusdion of four taxa and description of two new species. Papéis Avulsos de Zoologia 44 (2):13-43.:36 ( listed as synonym of Megischus furcatus (Lepeletier, 1825)).
Megischus annulator Brullé, 1846:539, ♀. Holotype ♀, inconnue. - Cameron, 1883-1888Cameron, P. 1883-1888. Biologia Centrali-Americana - Insecta. Hymenoptera. (Families Tenthredinidae-Chrysididae). Taylor and Francis, Red Lion Court, Fleet Street. 487 pp., 20 pl. (distribution), 419 (listed); Aguiar, 2004Aguiar, A.P. 2004. Additions to the revision of the genus Hemistephanus Enderlein (Hymenoptera: Stephanidae), with inclusdion of four taxa and description of two new species. Papéis Avulsos de Zoologia 44 (2):13-43.:36 ( listed as synonym of Megischus furcatus (Lepeletier, 1825)).
Bothriocerus Americanus Sichel, 1860:761 - Cameron, 1883-1888Cameron, P. 1883-1888. Biologia Centrali-Americana - Insecta. Hymenoptera. (Families Tenthredinidae-Chrysididae). Taylor and Francis, Red Lion Court, Fleet Street. 487 pp., 20 pl.:419 ( listed as synonym of Megischus annulator Brullé, 1846). - As Bothrioceros americanus: - Aguiar, 2004Aguiar, A.P. 2004. Additions to the revision of the genus Hemistephanus Enderlein (Hymenoptera: Stephanidae), with inclusdion of four taxa and description of two new species. Papéis Avulsos de Zoologia 44 (2):13-43.:36 ( listed as synonym of Megischus furcatus (Lepeletier, 1825)).