Otacustes chrysopæ Ashmead, 1894:243, ♂. Holotype ♂, Utica, Miss., August 7, 1893. - 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 Dichrogaster chrysopae: - Castillo et al., 2014Castillo Flores, P.M., E. Ruíz Cancino, J.M. Coronado Blanco, A.I. Khalaim & S.N. Myartseva 2014. Ichneumonidae (Hymenoptera: Ichneumonoidea) en un bosque de Quercus de Tamaulipas, México. Dugesiana 21 (2):161-174. (distribution); Rodríguez-Mota et al., 2015Rodríguez-Mota, A.J., E. Ruíz-Cancino, A.I. Khalaim, J.M. Coronado-Blanco & J. Treviño-Carreónj 2015. Diversidad de Ichneumonidae (Hymenoptera) en un bosque de Pinus spp. y Juniperus flaccida en Jaumave, Tamaulipas, México. Revista Mexicana de Biodiversidad 86:972-980. (distribution). - As Dichrogaster chrysopae chrysopae: - Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 1. Symphyta and Apocrita (Parasitica). Smithsonian Institution Press, Washington D.C. 1-1198. (distribution), 402 (stat. rev.).
Otacustes atriceps Ashmead, 1894:244, ♀. Holotype ♀, Utica, Miss., August 17, 1893. - 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); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 1. Symphyta and Apocrita (Parasitica). Smithsonian Institution Press, Washington D.C. 1-1198.:402 ( listed as synonym of Dichrogaster chrysopae chrysopae (Ashmead, 1894)).