Xylonomus albopictus Cresson, 1870:168, ♀.New York; Rohwer, 1920Rohwer, S.A. 1920. The North American Ichneumon-flies of the tribes Labenini, Rhyssini, Xoridini, Odontomerini, and Phytodietini. Proceedings of the United States National Museum 57:405-474.:437, Type (Acad. Nat. Sci. Philadelphia, No. 1518); Townes & Townes, 1960Townes, H.K. & M. Townes 1960. Ichneumon-flies of America North of Mexico: 2. Subfamilies Ephialtinae, Xoridinae, Acaenitinae. Bulletin of the United States National Museum 216 (2):1-676.:518, Type ♀ (Philadelphia). - 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 Xorides albopictus: - Rohwer, 1920Rohwer, S.A. 1920. The North American Ichneumon-flies of the tribes Labenini, Rhyssini, Xoridini, Odontomerini, and Phytodietini. Proceedings of the United States National Museum 57:405-474. (distribution); Townes & Townes, 1960Townes, H.K. & M. Townes 1960. Ichneumon-flies of America North of Mexico: 2. Subfamilies Ephialtinae, Xoridinae, Acaenitinae. Bulletin of the United States National Museum 216 (2):1-676. (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. (distribution); Porter, 2005Porter, C.C. 2005. New records of Xorides (Hymenoptera: Ichneumonidae: Xoridinae) from Florida. Insecta Mundi 19 (3):187-190. (distribution).
Xorides canadensis Provancher, 1875:248, Rohwer, 1920Rohwer, S.A. 1920. The North American Ichneumon-flies of the tribes Labenini, Rhyssini, Xoridini, Odontomerini, and Phytodietini. Proceedings of the United States National Museum 57:405-474.:437, type is lost unless it is one of the specimens under name Xylonomus albopictus; Townes & Townes, 1960Townes, H.K. & M. Townes 1960. Ichneumon-flies of America North of Mexico: 2. Subfamilies Ephialtinae, Xoridinae, Acaenitinae. Bulletin of the United States National Museum 216 (2):1-676.:518, Type ♂ (lost). - Rohwer, 1920Rohwer, S.A. 1920. The North American Ichneumon-flies of the tribes Labenini, Rhyssini, Xoridini, Odontomerini, and Phytodietini. Proceedings of the United States National Museum 57:405-474.:437 ( listed as synonym of Xorides albopictus (Cresson, 1870)); Townes & Townes, 1960Townes, H.K. & M. Townes 1960. Ichneumon-flies of America North of Mexico: 2. Subfamilies Ephialtinae, Xoridinae, Acaenitinae. Bulletin of the United States National Museum 216 (2):1-676.:518 ( listed as synonym of Xorides albopictus (Cresson, 1870)); 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.:392 ( listed as synonym of Xorides albopictus (Cresson, 1870)).
Xylonomus duplicatus Rohwer, 1913:356, Rohwer, 1920Rohwer, S.A. 1920. The North American Ichneumon-flies of the tribes Labenini, Rhyssini, Xoridini, Odontomerini, and Phytodietini. Proceedings of the United States National Museum 57:405-474.:438, Holotype ♂ (U.S.N.M., No. 15369); Townes & Townes, 1960Townes, H.K. & M. Townes 1960. Ichneumon-flies of America North of Mexico: 2. Subfamilies Ephialtinae, Xoridinae, Acaenitinae. Bulletin of the United States National Museum 216 (2):1-676.:518, Type ♂ (Washington). - Townes & Townes, 1960Townes, H.K. & M. Townes 1960. Ichneumon-flies of America North of Mexico: 2. Subfamilies Ephialtinae, Xoridinae, Acaenitinae. Bulletin of the United States National Museum 216 (2):1-676.:518 ( listed as synonym of Xorides albopictus (Cresson, 1870)); 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.:392 ( listed as synonym of Xorides albopictus (Cresson, 1870)). - As Xorides duplicatus: - Rohwer, 1920Rohwer, S.A. 1920. The North American Ichneumon-flies of the tribes Labenini, Rhyssini, Xoridini, Odontomerini, and Phytodietini. Proceedings of the United States National Museum 57:405-474. (distribution).