Sphex cærulea Linnaeus, 1763:412,Philadelphia (leg. De Geer), Lectotype ♂ (Stockholm), designated by Day, 1979Day, M.C. 1979. The species of Hymenoptera described by Linnaeus in the genera Sphex, Chrysis, Vespa, Apis and Mutilla. Biol. J. Linn. Soc. 12:45-84.:53. - Linnaeus, 1767Linnaeus, C. 1767. . 533-1327.:941 (listed); Day, 1979Day, M.C. 1979. The species of Hymenoptera described by Linnaeus in the genera Sphex, Chrysis, Vespa, Apis and Mutilla. Biol. J. Linn. Soc. 12:45-84.:53 ( listed as synonym of Chalybion californicum (Saussure, 1868)). - As Chalybion caeruleum: - Cameron, 1888Cameron, P. 1888. Biologia Centrali-Americana. Insecta. Hymenoptera. (Fossores) Vol. II. :1-33. (distribution); Cameron, 1888-1900Cameron, P. 1888-1900. Biologia Centrali-Americana - Insecta. Hymenoptera. (Fossores) Vol. II. R. H. Porter and Dulau & Co., London. 413pp, 14 pl.:25 (listed). - As Pelopoeus caeruleus: - Smith, 1856Smith, F. 1856. Catalogue of Hymenopterous Insects in the Collection of the British Museum. Part IV. Sphegidae, Larridae, and Crabronidae. London. 497 pp. (distribution); Cresson, 1872Cresson, E.T. 1872. Hymenoptera Texana. Transactions of the American Entomological Society 4:153-292. (distribution). - As Pepsis caerulea: - Smith, 1855Smith, F. 1855. Catalogue of Hymenopterous Insects in the collection of the British Museum. Part III, Mutillidae and Pompilidae. :203 pp, 5 pl. (distribution); Cresson, 1867Cresson, E.T. 1867. Notes on the Pompilidæ of North America, with descriptions of new species. Transactions of the American Entomological Society 1 (1867/1868):85-150. (distribution); Gundlach, 1887Gundlach, J. 1887. Apuntes para la fauna Puerto-Riqueña. Anales de la Sociedad Española de Historia Natural 16 (1):115-199. (distribution); Perez-Gelabert, 2008Perez-Gelabert, D.E. 2008. Arthropods of Hispaniola (Dominican Republic and Haiti): A checklist and bibliography. Zootaxa 1831:1-530. (distribution). - As Sceliphron caeruleum: - Fox, 1893Fox, W.J. 1893. Report on some mexican Hymenoptera, principally from lower California. Proceedings of the California Academy of Sciences ser.2 (4):1-25. (distribution); Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution), 381 (comb. nov.). - As Sceliphron coeruleum: - Kohl, 1918Kohl, F.F. 1918. Die Hautflüglergruppe 'Sphecinae'. IV. Teil. Die natürliche Gattung Sceliphron Klug (Pelopoeus Latr.). Annalen des Naturhistorischen Museums in Wien 32:1-171. (distribution). - As Sceliphron coeruleum: - Kohl, 1918Kohl, F.F. 1918. Die Hautflüglergruppe 'Sphecinae'. IV. Teil. Die natürliche Gattung Sceliphron Klug (Pelopoeus Latr.). Annalen des Naturhistorischen Museums in Wien 32:1-171. (distribution). - As Sphex caeruleum: - 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.:71 ( listed as synonym of Chalybion californicum (Saussure, 1868)).
Sphex caerulea Linnaeus, 1767 no. 2 = Linnaeus, 1763:941
Sphex cyanea Fabricius, 1775:346, sex not indicated.America septentrionali. - 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.:1577 ( listed as synonym of Chalybion californicum (Saussure, 1868)); 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.:71 ( listed as synonym of Chalybion californicum (Saussure, 1868)); Vardy, 2005Vardy, C.R. 2005. The New World tarantula-hawk wasp genus Pepsis Fabricius (Hymenoptera: Pompilidae). Part 3. The P. inclyta- to P. auriguttata-groups. Zoologische Mededelingen Leiden 79 (5):1-305.:287 ( listed as synonym of Chalybion californicum (Saussure, 1868)). - As Chalybion cyaneum: - Bequaert, 1929Bequaert, J.C. 1929. The folded-winged wasps of the Bermudas, with some preliminary remarks on insular wasp faunae. Annals of the Entomological Society of America 22 (4):555-582. (distribution); Fernald, 1942Fernald, H.T. 1942. Annotated list of Florida Sphecinae (Hym., Sphecidae). Entomological News 53 (10):286-291. (distribution). - As Pepsis cyanea: see Vardy 2005:287 not Linnaeus, 1758. - Smith, 1855Smith, F. 1855. Catalogue of Hymenopterous Insects in the collection of the British Museum. Part III, Mutillidae and Pompilidae. :203 pp, 5 pl.:201 (listed); Vardy, 2005Vardy, C.R. 2005. The New World tarantula-hawk wasp genus Pepsis Fabricius (Hymenoptera: Pompilidae). Part 3. The P. inclyta- to P. auriguttata-groups. Zoologische Mededelingen Leiden 79 (5):1-305.:287 ( listed as synonym of Chalybion californicum (Saussure, 1868)). - As Sceliphron cyaneum: - Hutson, 1919Hutson, J.C. 1919. The North American species of the genus Sceliphron (Hymenoptera). Transactions of the American Entomological Society 45 (3):203-227. (distribution), 219 (comb. nov.).
Pelopeus californicus Saussure, 1868:26, ♂♀. 12 ♀♀, 14 ♂♂, California. - As Chalybion californicum: - Hutson, 1919Hutson, J.C. 1919. The North American species of the genus Sceliphron (Hymenoptera). Transactions of the American Entomological Society 45 (3):203-227.:219 ( listed as synonym of Sceliphron cyaneum (Fabricius, 1775)); 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); 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); Ruíz-Cancino & Coronado-Blanco, 2002Ruíz-Cancino, E. & J.M. Coronado-Blanco 2002. Artrópodos terrestres de los estados de Tamaulipas y Nuevo León, México. Serie Publicaciones Cientificas No. 4:1-376. (distribution); Vardy, 2005Vardy, C.R. 2005. The New World tarantula-hawk wasp genus Pepsis Fabricius (Hymenoptera: Pompilidae). Part 3. The P. inclyta- to P. auriguttata-groups. Zoologische Mededelingen Leiden 79 (5):1-305.:287 (listed); Rasmussen & Asenjo, 2009Rasmussen, C. & A. Asenjo 2009. A checklist to the wasps of Peru (Hymenoptera, Aculeata). ZooKeys 15:1-78. (distribution); Ruíz-Cancino et al., 2010Ruíz-Cancino, E., D.R. Kasparyan, J.M. Coronado-Blanco, S.N. Myartseva, V.A. Trjapitzin, S.G. Hernández Aguilar & J. García Jiménez 2010. Himenópteros de la Reserva “El Cielo”, Tamaulipas, México. Dugesiana 17 (1):53-71. (distribution); Vanoye-Eligio et al., 2019Vanoye-Eligio, M., V. Meléndez-Ramírez, R. Ayala-Barajas, H. Delfín-González & J.V. Horta-Vega 2019. Diversidad de avispas depredadoras en dos tipos de vegetación del estado de Yucatán en México. Revista Mexicana de Biodiversidad 90:1-11. (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 Pelopoeus californicus: - As Sceliphron californicum: - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution), 382 (comb. nov.).