Cirrospilus crino Walker, 1838:382 - As Tetrastichus crino: - 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).
Tetrastichus dispar Silvestri, 1920:249 - 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.:993 ( listed as synonym of Tetrastichus crino (Walker, 1838)).
Tetrastichus oecanthivorus Gahan, 1932:743, no descr. Replacement name for Tetrastichus dispar Silvestri, 1920 by Gahan, 1932Gahan, A.B. 1932. Miscellaneous descriptions and notes on parasitic Hymenoptera. Annals of the Entomological Society of America 25:736-757.:743 (not T. dispar Masi). - 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.:993 ( listed as synonym of Tetrastichus crino (Walker, 1838)).
Tetrastichus oecanthivorus compar Gahan, 1932:743, ♂♀. Holotype, Carlisle and Mt. Holly Springs, Pa. (U.S.N.M., No. 43916, leg. C.C. Hill & J.S. Pinckney). - 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.:993 ( listed as synonym of Tetrastichus crino (Walker, 1838)).
Tetrastichus dubius Bakkendorf, 1955:152 - 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.:993 ( listed as synonym of Tetrastichus crino (Walker, 1838)).