Philanthus laticinctus Cresson, 1865:91, ♂. 2 ♂♂, Rocky Mountains, Colorado Territory (Ent. Soc. Philad., leg. Ridings). - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution). - As Clypeadon laticinctus: - 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).
Aphilanthops quadrinotatus Ashmead, 1890:7, ♂. Holotype ♂, Denver (leg. Horace G. Smith). - Cockerell, 1898Cockerell, T.D.A. 1898. Contributions to the entomology of New Mexico. Proc. Davenport Acad. nat. Sci. 7:139-148. (distribution); Viereck & Cockerell, 1904Viereck, H.L. & Cockerell, T.D.A. 1904. The Philanthinae of New Mexico. - II. Journal of the New York Entomological Society 12 (3):129-146. (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.:1728 ( listed as synonym of Clypeadon laticinctus (Cresson, 1865)). - As Philanthus quadrinotatus: - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749.:490 (comb. nov.).