Eucerceris conata Scullen, 1939:34, Muma, 1952Muma, M.H. 1952. Insect types in the collections of the University of Nebraska State Museum. Bulletin of the University of Nebraska State Museum 3 (8):1-35.:19, Type ♀ (University of Nebraska State Museum); Ferguson, 1981Ferguson, G.R. 1981. Synonymy and distribution records in the genus Eucerceris (Hymenoptera: Philanthidae). Journal of the New York Entomological Society 89 (3):172-183.:178, Holotype ♀ (Univ. of Nebraska, Lincoln). - 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); Ferguson, 1981Ferguson, G.R. 1981. Synonymy and distribution records in the genus Eucerceris (Hymenoptera: Philanthidae). Journal of the New York Entomological Society 89 (3):172-183. (distribution); Amarante, 2002Amarante, S.T.P. 2002. A synonymic catalog of the neotropical Crabronidae and Sphecidae (Hymenoptera: Apoidea). Arquivos de Zoologia (São Paulo) 37:1-139. (distribution).
Eucerceris hespera Scullen, 1948:171, Ferguson, 1981Ferguson, G.R. 1981. Synonymy and distribution records in the genus Eucerceris (Hymenoptera: Philanthidae). Journal of the New York Entomological Society 89 (3):172-183.:178, Holotype ♂ (Calif. Acad. Sci., San Francisco). - 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.:1738 ( listed as synonym of Eucerceris conata Scullen, 1939); Ferguson, 1981Ferguson, G.R. 1981. Synonymy and distribution records in the genus Eucerceris (Hymenoptera: Philanthidae). Journal of the New York Entomological Society 89 (3):172-183.:178 ( listed as synonym of Eucerceris conata Scullen, 1939); Amarante, 2002Amarante, S.T.P. 2002. A synonymic catalog of the neotropical Crabronidae and Sphecidae (Hymenoptera: Apoidea). Arquivos de Zoologia (São Paulo) 37:1-139.:62 ( listed as synonym of Eucerceris conata Scullen, 1939).