Oxybelus cladothricis Cockerell, 1895:309, ♂♀. ♂♀, Las Cruces, N. M., early in Sept. 1895. - As Belomicrus cladothricis: - Rohwer & Cockerell, 1908Rowher, S.A. & Cockerell, T.D.A. 1908. Some Oxybelinae wasps from New Mexico. Entomological News 19:179-180. (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 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution).
Belomicrus cladothricis prosopidis Pate, 1940:72, ♂♀. Holotype ♂, Palm Springs, Riverside County, California, April 10, 1932 (Academy of Natural Sciences of Philadelphia, no. 10562, leg. P.H. Timberlake). - 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 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1651 ( listed as synonym of Belomicrus cladothricis (Cockerell, 1895)).
Belomicrus minidoka Pate, 1940:79, ♂. Holotype ♂, Hagerman, Gooding County, Idaho, June 16, 1930 (United States National Museum). - 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 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1651 ( listed as synonym of Belomicrus cladothricis (Cockerell, 1895)).