Ophion cecropia Harris
Ichneumon macrurum Linnaeus, 1771:540, Hooker, 1912Hooker, C.W. 1912. The Ichneumon flies of America belonging to the tribe Ophionini. Transactions of the American Entomological Society 38 (1):1-176.:151, Type, Type location unknown; 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.:434, Type ♀ (lost). - As Allocamptus macrurus: - Morley, 1912Morley, C. 1912. A revision of the Ichneumonidae based on the collection in the British Museum (Natural History) Part I: Tribes Ophionides and Metopiides. British Museum, London, England. 1-88. (distribution). - As Eremotylus macrurus: - Hooker, 1912Hooker, C.W. 1912. The Ichneumon flies of America belonging to the tribe Ophionini. Transactions of the American Entomological Society 38 (1):1-176. (distribution). - As Ichneumon macrurus: - As Megarhyssa macrura: - Ruíz-Cancino et al., 2002Ruíz-Cancino, E., D.R. Kasparyan & J.M. Coronado Blanco 2002. Ichneumonidae. In: Llorente Bousquets, J. & J.J. Morrone (Ed.). Biodiversidad, taxonomía y biogeografía de artrópodos de México: Hacia una síntesis de su conocimiento, volumen III. 631-646. (distribution); Ruíz-Cancino & Coronado-Blanco, 2002Ruíz-Cancino, E. & J.M. Coronado-Blanco 2002. Artrópodos terrestres de los estados de Tamaulipas y Nuevo León, México. Serie Publicaciones Cientificas No. 4:1-376. (distribution); Ruíz-Cancino et al., 2010Ruíz-Cancino, E., A.I. Khalaim, J.M. Coronado-Blanco, A.E. Humala, A.R. Rodríguez-Berrío & K. Sääksjärvi 2010. Ichneumonidae (Hymenoptera) de localidades de Santiago, Nuevo León, México. Entomología mexicana 9:912-915. (distribution); Ruíz-Cancino et al., 2013Ruíz-Cancino, E., A.I. Khalaim, D.R. Kasparyan & J.M. Coronado Blanco 2013. El género Megarhyssa (Hymenoptera: Ichneumonidae: Rhyssinae) en México. In: (Ed.). Memorias 25° Encuentro Nacional de Investigación Científica y Tecnológica del Golfo de México. 37-40. (distribution). - As Megarhyssa macrurus: - Khalaim et al., 2021Khalaim, A.I., E. Ruíz-Cancino & J.M. Coronado-Blanco 2021. Darwin wasps of Mexico (Hymenoptera: Ichneumonidae): the subfamily Rhyssinae. Russian Entomological Journal 30 (3):305-313. (distribution). - As Ophion macrurum: - Norton, 1863Norton, E. 1863. Catalogue of our species of Ophion, Anomalon, Paniscus and Campoplex. Proceedings of the Entomological Society of Philadelphia 1:357-368. (distribution); Cresson, 1872Cresson, E.T. 1872. Hymenoptera Texana. Transactions of the American Entomological Society 4:153-292. (distribution).
Ichneumon Georgicus Megerle, 1802:16, 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.:434, Type ♀ (lost). Synonymized with Megarhyssa macrurus macrurus (Linnaeus, 1771) by 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.:434. - 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.:355 ( listed as synonym of Megarhyssa macrurus macrurus (Linnaeus, 1771)); Pook et al., 2016Pook, V.G., M.J. Sharkey & D.B. Wahl 2016. Key to the species of Megarhyssa (Hymenoptera, Ichneumonidae, Rhyssinae) in America, north of Mexico. Deutsche entomologische Zeitschrift 63 (1):137-148.:143 ( listed as synonym of Megarhyssa macrurus macrurus (Linnaeus, 1771)); Khalaim et al., 2021Khalaim, A.I., E. Ruíz-Cancino & J.M. Coronado-Blanco 2021. Darwin wasps of Mexico (Hymenoptera: Ichneumonidae): the subfamily Rhyssinae. Russian Entomological Journal 30 (3):305-313.:311 ( listed as synonym of Megarhyssa macrurus (Linnaeus, 1771)).
Megarhyssa lunatrix Schulz, 1906:115 - Pook et al., 2016Pook, V.G., M.J. Sharkey & D.B. Wahl 2016. Key to the species of Megarhyssa (Hymenoptera, Ichneumonidae, Rhyssinae) in America, north of Mexico. Deutsche entomologische Zeitschrift 63 (1):137-148.:143 (emendation).
Megarhyssa lunator phaeoptila Michener, 1939:129, ♀. Holotype ♀, Victoria, Texas, October 15, 1910 (U. S. N. M., number 53193, leg. J.D. Mitchell); 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.:434, Type ♀ (Washington). Synonymized with Megarhyssa macrurus macrurus (Linnaeus, 1771) by 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.:434. - Michener, 1939Michener, C.D. 1939. Notes on North American species of Megarhyssa (Hymenoptera, Ichneumonidae). The Pan Pacific Entomologist 15 (2):126-132. (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.:355 ( listed as synonym of Megarhyssa macrurus macrurus (Linnaeus, 1771)); Pook et al., 2016Pook, V.G., M.J. Sharkey & D.B. Wahl 2016. Key to the species of Megarhyssa (Hymenoptera, Ichneumonidae, Rhyssinae) in America, north of Mexico. Deutsche entomologische Zeitschrift 63 (1):137-148.:143 ( listed as synonym of Megarhyssa macrurus macrurus (Linnaeus, 1771)); Khalaim et al., 2021Khalaim, A.I., E. Ruíz-Cancino & J.M. Coronado-Blanco 2021. Darwin wasps of Mexico (Hymenoptera: Ichneumonidae): the subfamily Rhyssinae. Russian Entomological Journal 30 (3):305-313.:311 ( listed as synonym of Megarhyssa macrurus (Linnaeus, 1771)).