Brachycistis petiolatus Fox, 1893:8, ♂. 14 ♂♂, Calmalli Mines, L. Cal., April (leg. Haines); 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.:272, 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.:21, Holotype ♂ (CAS). - Fox, 1899Fox, W.J. 1899. The North American Mutillidae. Transactions of the American Entomological Society 25:219-300. (distribution). - As Brachycistis petiolata: - 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); 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). - As Mutilla petiolata: - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution), 72 (comb. nov.).
Brachycistis gaudii Cockerell, 1901:340, ♂. 3 ♂♂, La Jolla, San Diego Co., California, Aug. 1901, Lectotype ♂ (NMNH), designated by 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.:21. - 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); 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.:1269 ( listed as synonym of Brachycistis petiolata Fox, 1893); 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.:21 ( listed as synonym of Brachycistis petiolata Fox, 1893).
Brachycistis parva Malloch, 1926:14, ♂. Holotype ♂, California (U.S.N.M., No. 27913, leg. C.F. Baker); 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.:21, Holotype ♂ (NMNH). - 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.:1269 ( listed as synonym of Brachycistis petiolata Fox, 1893); 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.:21 ( listed as synonym of Brachycistis petiolata Fox, 1893).