Mesostenus melanoleucus Brullé, 1846:204, ♂. ♂, le Mexique (leg. Ghiesbreght); Kasparyan & Ruíz-Cancino, 2003Kasparyan, D.R. & E. Ruíz Cancino 2003. Review of Mexican species of the genus Polycyrtus Spinola, 1840 (Hymenoptera: Ichneumonidae: Cryptini), with a key to the species of North America. Russian Entomological Journal 12 (3):311-327.:325, Type ♂ (Mus. Paris). - Cresson, 1861Cresson, E.T. 1861. A catalogue of the described species of several families of Hymenoptera inhabiting North America. Proceedings of the Entomological Society of Philadelphia 1:202-211. (distribution); Cresson, 1873Cresson, E.T. 1873. Descriptions of Mexican Ichneumonidae. Proceedings of the Academy of Natural Sciences of Philadelphia 25:104-176. (distribution). - As Polycyrtus melanoleucus: - 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), 231 (listed); 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); 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); Kasparyan & Ruíz-Cancino, 2003Kasparyan, D.R. & E. Ruíz Cancino 2003. Review of Mexican species of the genus Polycyrtus Spinola, 1840 (Hymenoptera: Ichneumonidae: Cryptini), with a key to the species of North America. Russian Entomological Journal 12 (3):311-327. (distribution); Kasparyan & Ruíz-Cancino, 2008Kasparyan, D.R. & E. Ruíz Cancino 2008. Cryptini de México (Hymenoptera: Ichneumonidae: Cryptinae) Parte II. Victoría, México. 1-373. (distribution); Ruíz-Cancino, 2010Ruíz-Cancino E. 2010. Ichneumonidae (Hymenoptera) de Tamaulipas, México. Editorial Planea, México. 185 pp. (distribution); Pérez-Urbina et al., 2018Pérez-Urbina, B.A., J.M. Coronado-Blanco, E. Ruíz-Cancino, C.S. Venegas-Barrera, A. Correa-Sandoval & J.V. Horta-Vega 2018. Community structure of Ichneumonidae (Hymenoptera) in a mangrove area in the coastal zone of Tamaulipas, Mexico. Revista Mexicana de Biodiversidad 89:823-835. (distribution).
Polycyrtus confirmatus Cameron, 1885:232,Guatemala, Volcan de Atitlan 2500 to 3500 feet (leg. Champion); Kasparyan & Ruíz-Cancino, 2003Kasparyan, D.R. & E. Ruíz Cancino 2003. Review of Mexican species of the genus Polycyrtus Spinola, 1840 (Hymenoptera: Ichneumonidae: Cryptini), with a key to the species of North America. Russian Entomological Journal 12 (3):311-327.:325, Type ♀ (Mus. London); Kasparyan & Ruíz-Cancino, 2008Kasparyan, D.R. & E. Ruíz Cancino 2008. Cryptini de México (Hymenoptera: Ichneumonidae: Cryptinae) Parte II. Victoría, México. 1-373.:295, Type ♀ (Mus. Londres). - 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.:232 (listed); 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); Kasparyan & Ruíz-Cancino, 2003Kasparyan, D.R. & E. Ruíz Cancino 2003. Review of Mexican species of the genus Polycyrtus Spinola, 1840 (Hymenoptera: Ichneumonidae: Cryptini), with a key to the species of North America. Russian Entomological Journal 12 (3):311-327.:325 ( listed as synonym of Polycyrtus melanoleucus (Brullé, 1846)); Kasparyan & Ruíz-Cancino, 2008Kasparyan, D.R. & E. Ruíz Cancino 2008. Cryptini de México (Hymenoptera: Ichneumonidae: Cryptinae) Parte II. Victoría, México. 1-373.:295 ( listed as synonym of Polycyrtus melanoleucus (Brullé, 1846)).
Polycyrtus nigricornis Szépligeti, 1916:275, ♀.Columbien: Cauca-Tal (Ungarische National-Museum); Kasparyan & Ruíz-Cancino, 2003Kasparyan, D.R. & E. Ruíz Cancino 2003. Review of Mexican species of the genus Polycyrtus Spinola, 1840 (Hymenoptera: Ichneumonidae: Cryptini), with a key to the species of North America. Russian Entomological Journal 12 (3):311-327.:325, Type ♀ (Mus. Budapest); Kasparyan & Ruíz-Cancino, 2008Kasparyan, D.R. & E. Ruíz Cancino 2008. Cryptini de México (Hymenoptera: Ichneumonidae: Cryptinae) Parte II. Victoría, México. 1-373.:295, Type ♀ (Museo Budapest). - Kasparyan & Ruíz-Cancino, 2003Kasparyan, D.R. & E. Ruíz Cancino 2003. Review of Mexican species of the genus Polycyrtus Spinola, 1840 (Hymenoptera: Ichneumonidae: Cryptini), with a key to the species of North America. Russian Entomological Journal 12 (3):311-327.:325 ( listed as synonym of Polycyrtus melanoleucus (Brullé, 1846)); Kasparyan & Ruíz-Cancino, 2008Kasparyan, D.R. & E. Ruíz Cancino 2008. Cryptini de México (Hymenoptera: Ichneumonidae: Cryptinae) Parte II. Victoría, México. 1-373.:295 ( listed as synonym of Polycyrtus melanoleucus (Brullé, 1846)).