Tachytes sayi Banks, 1942:421, ♂. Holotype ♂, Clear Creek, Colo. (M.C.Z., no. 25673, leg. Oslar). - Banks, 1942Banks, N. 1942. Notes on the United States species of Tachytes. Bulletin of the Museum of Comparative Zoology 89:395-436. (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).
Tachytes brevipilis Banks, 1942:422, ♀. Holotype ♀, Lee Co., Texas, June (M.C.Z., no. 25636, leg. Birkmann). - 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.:1624 ( listed as synonym of Tachytes sayi Banks, 1942).
Tachytes hesperus Banks, 1942:423, ♂♀. Types (M.C.Z., no. 25637). - Banks, 1942Banks, N. 1942. Notes on the United States species of Tachytes. Bulletin of the Museum of Comparative Zoology 89:395-436. (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.:1624 ( listed as synonym of Tachytes sayi Banks, 1942).