Microdus fulvescens Cresson, 1865:297, ♀. Holotype ♀, Colorado Territory, 1864 (leg. Mr. James Ridings); Muesebeck, 1927Muesebeck, C.F.W. 1927. A revision of the parasitic wasps of the subfamily Braconinae occuring in America north of Mexico. Proceedings of the United States National Museum 69 (art. 16):1-73.:19, Type (Academy of Natural Sciences at Philadelphia, Pennsylvania, No. 1727.1); Figueroa et al., 2011Figueroa, J.I., M.J. Sharkey, J.R. Nápoles, J.A. Sanchez-García, A.M. Martínez, V. López-Martínez & S. Pineda 2011. Revision of the new world genus Crassomicrodus Ashmead (Hymenoptera, Braconidae, Agathidinae), with an identification key to species. ZooKeys 142:27-75.:46, Holotype ♀ (ANSP, No. 1727.1). - Cockerell, 1898Cockerell, T.D.A. 1898. The insect visitors of flowers in New Mexico. - I. Zoologist ser .4: v. 2:78-81. (distribution); Dalla Torre, 1898Dalla Torre, C.G. 1898. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. - IV: Braconidae. Sumptibus Guilelmi Engelmann, VIII + 323. (distribution); Cockerell, 1899Cockerell, T.D.A. 1899. A first list of the hymenopterous families Tenthredinidae, Siricidae, Chrysididae, Proctotrypidae, Cynipidae, Chalcididae and Braconidae collected in New Mexico. Transactions of the Kansas Academy of Sciences 16:212-216. (distribution). - As Agathirsia fulvescens: - Coronado et al., 2004Coronado Blanco, J.M., E. Ruíz Cancino & S.E. Varela Fuentes 2004. Adenda a Braconidae (Hymenoptera). In: Bousquets, J.L., J.J. Morrone, O.Y. Ordóñez & I.V. Fernández (Ed.). Biodiversidad, Taxonomía y Biogeografía de artrópodos de México: Hacia una síntesis de su conocimiento. Volumen IV. 713-720. (distribution). - As Crassomicrodus fulvescens: - Viereck, 1905Viereck, H.L. 1905. Notes and descriptions of Hymenoptera from the Western United States, in the collection of the University of Kansas. Transactions of the Annual Meetings of the Kansas Academy of Science 19:264-326. (distribution); Muesebeck, 1927Muesebeck, C.F.W. 1927. A revision of the parasitic wasps of the subfamily Braconinae occuring in America north of Mexico. Proceedings of the United States National Museum 69 (art. 16):1-73. (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); Coronado et al., 2004Coronado Blanco, J.M., E. Ruíz Cancino & S.E. Varela Fuentes 2004. Adenda a Braconidae (Hymenoptera). In: Bousquets, J.L., J.J. Morrone, O.Y. Ordóñez & I.V. Fernández (Ed.). Biodiversidad, Taxonomía y Biogeografía de artrópodos de México: Hacia una síntesis de su conocimiento. Volumen IV. 713-720. (distribution); Coronado-Blanco, 2011Coronado-Blanco, J. M. 2011. Braconidae (Hymenoptera) de Tamaulipas, México. Universidad Autónoma de Tamaulipas, Tamaulipas, México. 1-204. (distribution); Coronado-Blanco, 2013Coronado Blanco, J.M. 2013. La familia Braconidae (Hymenoptera) en México. Entomología mexicana 12 (1):31-46. (distribution); Coronado et al., 2016Coronado-Blanco, J. M., J.I. Figueroa-De la Rosa, C.E. Sarmiento-Monroy, E. Ruíz-cancion & A.I. Khalaim 2016. Agathidinae (Hymenoptera: Braconidae) de México, incluyendo nuevos registros. CienciaUAT 2 (1):6-21. (distribution); Coronado et al., 2018Coronado Blanco, J.M., G.I. Ventura-González, E. Ruíz-Cancino & A.I. Khalaim 2018. Conocimiento actual de Braconidae (Hymenoptera) del estado de Chihuahua, México. Boletín de la Sociedad Mexicana de Entomología (nueva serie) 4 (3):63-66. (distribution).
Microdus medius Cresson, 1865:298, ♂. Holotype ♂, Colorado Territory, 1864 (leg. Mr. James Ridings); Muesebeck, 1927Muesebeck, C.F.W. 1927. A revision of the parasitic wasps of the subfamily Braconinae occuring in America north of Mexico. Proceedings of the United States National Museum 69 (art. 16):1-73.:19, Type (Academy of Natural Sciences at Philadelphia, Pennsylvania, No. 1725). - Dalla Torre, 1898Dalla Torre, C.G. 1898. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. - IV: Braconidae. Sumptibus Guilelmi Engelmann, VIII + 323. (distribution); Figueroa et al., 2011Figueroa, J.I., M.J. Sharkey, J.R. Nápoles, J.A. Sanchez-García, A.M. Martínez, V. López-Martínez & S. Pineda 2011. Revision of the new world genus Crassomicrodus Ashmead (Hymenoptera, Braconidae, Agathidinae), with an identification key to species. ZooKeys 142:27-75.:46 ( listed as synonym of Crassomicrodus fulvescens (Cresson, 1865)). - As Crassomicrodus medius: - Viereck, 1905Viereck, H.L. 1905. Notes and descriptions of Hymenoptera from the Western United States, in the collection of the University of Kansas. Transactions of the Annual Meetings of the Kansas Academy of Science 19:264-326. (distribution); Muesebeck, 1927Muesebeck, C.F.W. 1927. A revision of the parasitic wasps of the subfamily Braconinae occuring in America north of Mexico. Proceedings of the United States National Museum 69 (art. 16):1-73. (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).