Brachycistis inæqualis Fox, 1899:282, ♂. Holotype ♂, California: Los Angeles, September (U. S. National Museum); Bradley, 1917Bradley, J.C. 1917. Contributions toward a monograph of the Mutillidae and their allies of America North of Mexico. Transactions of the American Entomological Society 43:247-290.:266, Type (United States National Museum); Kimsey & Wasbauer, 2006Kimsey, L.S. & Wasbauer M.S. 2006. Phylogeny and checklist of the nocturnal Tiphiids of the Western Hemisphere (Hymenoptera: Tiphiidae: Brachycistidinae). Journal of Hymenoptera Research 15 (1):9-25.:20, Lectotype ♂ (NMNH). - Melander, 1903Melander, A.L. 1903. Notes on North American Mutillidae, with descriptions of new species. Transactions of the American Entomological Society 29 (4):291-330. (distribution); Bradley, 1917Bradley, J.C. 1917. Contributions toward a monograph of the Mutillidae and their allies of America North of Mexico. Transactions of the American Entomological Society 43:247-290. (distribution); Malloch, 1926Malloch, J.R. 1926. Systematic notes on and descriptions of North American wasps of the subfamily Brachycistidinae. Proceedings of the United States National Museum 68:1-28. (distribution); Wasbauer, 1973Wasbauer, M.S. 1973. The male brachycistidine wasps of the Nevada Test Site (Hymenoptera: Tiphiidae). Great Basin Naturalist 33 (2):109-112. (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).
Brachycistis nevadensis Fox, 1899:283, ♂. Holotype ♂, Nevada; Bradley, 1917Bradley, J.C. 1917. Contributions toward a monograph of the Mutillidae and their allies of America North of Mexico. Transactions of the American Entomological Society 43:247-290.:266, Type (American Entomological Society); Kimsey & Wasbauer, 2006Kimsey, L.S. & Wasbauer M.S. 2006. Phylogeny and checklist of the nocturnal Tiphiids of the Western Hemisphere (Hymenoptera: Tiphiidae: Brachycistidinae). Journal of Hymenoptera Research 15 (1):9-25.:20, Holotype ♂ (ANSP). - Bradley, 1917Bradley, J.C. 1917. Contributions toward a monograph of the Mutillidae and their allies of America North of Mexico. Transactions of the American Entomological Society 43:247-290. (distribution); Malloch, 1926Malloch, J.R. 1926. Systematic notes on and descriptions of North American wasps of the subfamily Brachycistidinae. Proceedings of the United States National Museum 68:1-28. (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.:1270 ( listed as synonym of Brachycistis inaequalis Fox, 1899); Kimsey & Wasbauer, 2006Kimsey, L.S. & Wasbauer M.S. 2006. Phylogeny and checklist of the nocturnal Tiphiids of the Western Hemisphere (Hymenoptera: Tiphiidae: Brachycistidinae). Journal of Hymenoptera Research 15 (1):9-25.:20 ( listed as synonym of Brachycistis inaequalis Fox, 1899).
Brachycistis nocticola Bradley, 1917:289 Fig. 19 - 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.:1270 ( listed as synonym of Brachycistis inaequalis Fox, 1899); Kimsey & Wasbauer, 2006Kimsey, L.S. & Wasbauer M.S. 2006. Phylogeny and checklist of the nocturnal Tiphiids of the Western Hemisphere (Hymenoptera: Tiphiidae: Brachycistidinae). Journal of Hymenoptera Research 15 (1):9-25.:20 ( listed as synonym of Brachycistis inaequalis Fox, 1899).