Ichneumon inquisitor Say, 1828:71, sex not indicated. Townes, 1944Townes, H.K. 1944. A catalogue and reclassification of the Nearctic Ichneumonidae (Hymenoptera) - Part I. The subfamilies Ichneumoninae, Tryphoninae, Cryptinae, Phaeogeninae and Lissonotinae. Memoirs of the American Entomological Society 11 (1-2):1-477.:40, type destroyed; 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.:171, Type ♀ (destroyed). - Townes, 1944Townes, H.K. 1944. A catalogue and reclassification of the Nearctic Ichneumonidae (Hymenoptera) - Part I. The subfamilies Ichneumoninae, Tryphoninae, Cryptinae, Phaeogeninae and Lissonotinae. Memoirs of the American Entomological Society 11 (1-2):1-477.:40 ( listed as synonym of Iseropus coelebs (Walsh, 1873)); 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.:171 ( listed as synonym of Iseropus coelebs (Walsh, 1873)); 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.:332 ( listed as synonym of Iseropus coelebs (Walsh, 1873)). - As Pimpla inquisitor: - Cresson, 1872Cresson, E.T. 1872. Hymenoptera Texana. Transactions of the American Entomological Society 4:153-292. (distribution).
Pimpla cœlebs Walsh, 1873:141, ♂. 2 ♂♂; 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.:172, Type ♂, destroyed in Chicago fire of 1871. - As Iseropus coelebs: - Townes, 1944Townes, H.K. 1944. A catalogue and reclassification of the Nearctic Ichneumonidae (Hymenoptera) - Part I. The subfamilies Ichneumoninae, Tryphoninae, Cryptinae, Phaeogeninae and Lissonotinae. Memoirs of the American Entomological Society 11 (1-2):1-477. (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).
Pimpla inquisitoriella Dalla Torre, 1901:435, no descr. Replacement name for Ichneumon inquisitor Say, 1828 by 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.:435 (preoccupied by Scopoli). - Townes, 1944Townes, H.K. 1944. A catalogue and reclassification of the Nearctic Ichneumonidae (Hymenoptera) - Part I. The subfamilies Ichneumoninae, Tryphoninae, Cryptinae, Phaeogeninae and Lissonotinae. Memoirs of the American Entomological Society 11 (1-2):1-477.:40 ( listed as synonym of Iseropus coelebs (Walsh, 1873)); 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.:171 ( listed as synonym of Iseropus coelebs (Walsh, 1873)); 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.:332 ( listed as synonym of Iseropus coelebs (Walsh, 1873)).