Eusterinx negligere Davis, 1897:246, ♀. Holotype ♀, New Jersey (Amer. Ent. Soc.). - As Thymaris negligere: - 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).
Callidiotes kansensis Brues, 1907:55 - 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.:366 ( listed as synonym of Thymaris negligere (Davis, 1897)).
Thymaris americanus Cushman, 1919:381, ♂♀. Holotype, Rosslyn, Virginia (U.S.N.M., No. 22004, leg. H.H. Smith). - Cushman, 1919Cushman, R.A. 1919. Notes on certain genera of Ichneumon-flies with descriptions of a new genus and four species. Proceedings of the United States National Museum 56 (2296):373-382. (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 1. Symphyta and Apocrita (Parasitica). Smithsonian Institution Press, Washington D.C. 1-1198.:366 ( listed as synonym of Thymaris negligere (Davis, 1897)).