Bethylus fenestratus Klug in Weber, 1810:193 - As Tiphia fenestrata:  - 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).
Tiphia confusa Allen, 1934:302, ♀. Holotype ♀, Tampa, Florida (U.S.N.M., No. 50495);  Allen, 1966Allen, H.W. 1966. A revision of the Tiphiinae (Hymenoptera: Tiphiidae) of Eastern North America. Transactions of the American Entomological Society 92:231-356.:253, Holotype ♀ (USNM). - Allen, 1934Allen, H.W. 1934. Descriptions of twelve new species of Tiphiidae from the United States with taxonomic notes (Hymenoptera). Transactions of the American Entomological Society 60:295-316. (distribution); Allen, 1966Allen, H.W. 1966. A revision of the Tiphiinae (Hymenoptera: Tiphiidae) of Eastern North America. Transactions of the American Entomological Society 92:231-356. (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.:1256 ( listed as synonym of Tiphia fenestrata (Klug in Weber, 1810)).