Mesostenus pusillus Cresson, 1865:31, ♀. Holotype ♀, Cuba (Dr. J. Gundlach); Alayo, 1973Alayo, P.D. 1973. Catálogo de los Himenopteros de Cuba. Instituto Cubano del libro, La Habana. 1-218.:38, Type (Gundlach, No. 104); Porter, 1975Porter, C.C. 1975. A new floridian Polycyrtidea with comments on Zoogeography of Florida Mesostenini (Hymenoptera: Ichneumonidae). The Florida Entomologist 58 (4):247-255.:251, Holotype (Gundlach collection at Havana, Cuba). - Cresson, 1865Cresson, E.T. 1865. On the Hymenoptera of Cuba. Proceedings of the Entomological Society of Philadelphia 4:200 pp. (distribution); Ashmead, 1900Ashmead, W.H. 1900. Report upon the aculeate Hymenoptera of the islands of St. Vincent and Grenada, with additions to the parasitic Hymenoptera and a list of the described Hymenoptera of the West Indies. Transactions of the Entomological Society of London pt. II:207-367. (distribution); 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 Polycyrtidea pusilla: - Alayo, 1973Alayo, P.D. 1973. Catálogo de los Himenopteros de Cuba. Instituto Cubano del libro, La Habana. 1-218. (distribution); Porter, 1975Porter, C.C. 1975. A new floridian Polycyrtidea with comments on Zoogeography of Florida Mesostenini (Hymenoptera: Ichneumonidae). The Florida Entomologist 58 (4):247-255. (distribution); Portuondo Ferrer & Fernández Triana, 2004Portuondo Ferrer, E. & J.L. Fernández Triana 2004. Biodiversidad del orden Hymenoptera en los macizos montañosos de Cuba oriental. Boletín de la Sociedad Entomológica Aragonesa 35:121-136. (distribution); Maceira et al., 2005 2005. Cuba: Pico Mogote. Rapid Biological Inventories Report 09. The Field Museum, Chicago. 1-190. (distribution). - As Polycyrtidea pusillus: - Cushman, 1929Cushman, R.A. 1929. A revision of the North American Ichneumon-flies of the genus Mesostenus and related genera. Proceedings of the United States National Museum 74 (art. 16):1-58.:52 (comb. nov.).