Opius basiniger Viereck, 1905:270, ♀. Holotype ♀, Douglas county, Kansas, July (University of Kansas, leg. E. S. Tucker). - 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).
Opius foersteri Gahan, 1915:83, ♂♀. Type, Kirkwood, Missouri, September 25, 1881 (U.S.N.M., No. 19366, leg. Murtfeldt). Synonymized with Opius basiniger Viereck, 1905 by Marsh, 1974Marsh, P.M. 1974. New combinations and new synonyms in North American Braconidae (Hymenoptera). Proceedings of the Entomological Society of Washington 76:285-289.:286. - Muesebeck, 1958Muesebeck, C.F.W. 1958. Family Braconidae. 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. 18-36. (distribution); Fischer, 1970Fischer, M. 1970. Die nearktischen Opiinae der Sammlung der Cornell University, Department of Entomology and Limnology, in Ithaca, New York (Hymenoptera, Braconidae). Anzeiger der Mathematisch-Naturwissenschaftlichen Klasse der Österreichischen Akademie der Wissenschaften 1970 (1):12-32. (distribution); Fischer, 1970Fischer, M. 1970. Die Opiinae der University of Minnesota, Department of Entomology, in St. Paul U.S.A. (Hymenoptera, Braconidae). Acta zoologica Cracoviensia 15 (6):299-314. (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.:204 ( listed as synonym of Opius basiniger Viereck, 1905).