Holcopelte missouriensis Ashmead, 1888:101, ♀.Missouri; Hansson et al., 2004Hansson, C., A. Aebi & B. Benrey 2004. Horismenus species (Hymenoptera: Eulophidae) in a bruchid beetle parasitoid guild, including the description of a new species. Zootaxa 548:1-16.:12, Lectotype ♀, examined (USNM). - As Horismenus missouriensis: - Burks, 1958Burks, B.D. 1958. Superfamily Chalcidoidea. In: Krombein, K.V. (Ed.). Hymenoptera of America North of Mexico - Synoptic Catalog. Washington: U.S. Department of Agriculture. Agriculture Monograph No. 2. First Supplement, 305 pp. 62-84. (distribution); González-Hernández, 2004González-Hernández, A. 2004. Actualización del catálogo de autoridades taxonómicas: Hymenoptera-Parasítica. Depto. de Zoología de Invertebrados. Facultad de Ciencias Biológicas, UANL. Base de datos SNIB-Conabio proyecto BE008. México. D.F. :. (distribution); Hansson et al., 2004Hansson, C., A. Aebi & B. Benrey 2004. Horismenus species (Hymenoptera: Eulophidae) in a bruchid beetle parasitoid guild, including the description of a new species. Zootaxa 548:1-16. (distribution); Hansson, 2011Hansson, C. 2011. Catalogue of the Eulophidae in the neotropical region (2009 updated 2011). :1-78. (distribution); Noyes, 2019Noyes, J.S. 2019. Universal Chalcidoidea Database. World Wide Web electronic publication. :. (distribution).
Holcopelte popenoei Ashmead, 1888:101, ♀.Kansas (leg. Prof. E.A. Popenoe). - Hansson et al., 2004Hansson, C., A. Aebi & B. Benrey 2004. Horismenus species (Hymenoptera: Eulophidae) in a bruchid beetle parasitoid guild, including the description of a new species. Zootaxa 548:1-16.:12 ( listed as synonym of Horismenus missouriensis (Ashmead, 1888)); Hansson, 2011Hansson, C. 2011. Catalogue of the Eulophidae in the neotropical region (2009 updated 2011). :1-78.:34 ( listed as synonym of Horismenus missouriensis (Ashmead, 1888)).