Crabro excavatus excavatus Fox, 1892:10 - As Crabro excavatus: - Fox, 1895Fox, W.J. 1895. The Crabroninae of Boreal America. Transactions of the American Entomological Society 22 (2):129-226.:149 ( listed as synonym of Crabro rufipes (Lepeletier & Brullé, 1834)); Pate, 1946Pate, V.S.L. 1946. New pemphilidine wasps, with notes on previously described forms. I. Ectemnius (Hymenoptera: Sphecidae). Notulae Naturae of the Academy of Natural Sciences of Philadelphia 171:1-14. (distribution). - As Ectemnius excavatus: - 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); Horta Vega et al., 2007Horta Vega, J.V., O.N. Pinson Domínguez, L. Barrientos Lozano & A. Correa Sandoval 2007. Sphecidae y Crabronidae (Hymenoptera) de algunos municipios del centro y sur de Tamaulipas, México. Acta Zool. Mex. (n.s.) 23:35-48. (distribution); Horta Vega et al., 2013Horta Vega, J.V., M. Vanoye-Eligio, M.E. García-Gutiérrez, J.M.Coronado-Blanco & L. Barrientos-Lozano 2013. Crabronidae (Hymenoptera) de la localidad Cañón del Novillo, Victoria, Tamaulipas, México. Acta Zool. Mex. (n.s.) 29 (2):376-387. (distribution); Vanoye-Eligio et al., 2014Vanoye-Eligio, M., V. Meléndez-Ramírez, R. Ayala, J. Navarro & H. Delfin-González 2014. Predatory Wasps (Hymenoptera) of the Yucatan Peninsula. Southwestern Entomoloigst 39 (3):635-646. (distribution); Vanoye-Eligio et al., 2015Vanoye-Eligio, M., V. Meléndez-Ramírez, R. Ayala, J. Navarro-Alberto & H. Delfín-González 2015. Avispas depredadoras de áreas naturales protegidas del estado de Yucatán, México. Revista Mexicana de Biodiversidad 86:989-997. (distribution); Nava-Bolaños & Osorio-Olvera, 2022Nava-Bolaños, A. & L. Osorio-Olvera 2022. Estado del arte del conocimiento de biodiversidad de los polinizadores de México. Revista Mexicana de Biodiversidad 93:1-77. (distribution). - As Ectemnius excavatus excavatus: - 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); Leclercq, 2007Leclercq, J. 2007. Hyménoptères Crabroniens des Amériques du genre Ectemnius Dahlbom 1845 (Hymenoptera: Crabronidae Crabronini). Notes fauniques de Gembloux 60 (4):163-177. (distribution).
Crabro banksi Rohwer, 1909:147 - Pate, 1946Pate, V.S.L. 1946. New pemphilidine wasps, with notes on previously described forms. I. Ectemnius (Hymenoptera: Sphecidae). Notulae Naturae of the Academy of Natural Sciences of Philadelphia 171:1-14. (distribution), 13 ( listed as synonym of Ectemnius excavatus (Fox, 1892)); 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.:27 ( listed as synonym of Ectemnius excavatus (Fox, 1892)). - As Ectemnius excavatus banksi: - Krombein, 1963Krombein, K.V. 1963. Natural history of Plummers Island, Maryland. XVII. Annotated list of the wasps (Hymenoptera: Bethyloidea, Scolioidea, Vespoidea, Pompiloidea, Sphecoidea). Proceedings of the Biological Society of Washington 76:255-280. (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); Leclercq, 2007Leclercq, J. 2007. Hyménoptères Crabroniens des Amériques du genre Ectemnius Dahlbom 1845 (Hymenoptera: Crabronidae Crabronini). Notes fauniques de Gembloux 60 (4):163-177. (distribution).