americanus. Camponotus americanus Mayr, 1862: 661 (w.q.) U.S.A. Emery, 1893i: 674 (m.); Wheeler, G.C. & Wheeler, J. 1968: 216 (l.). Combination in Camponotus): Emery, 1925b: 74. Junior synonym of castaneus: Mayr, 1886d: 420. Revived from synonymy as subspecies of castaneus: Emery, 1893i: 674; Wheeler, W.M. 1913c: 117; Wheeler, W.M. 1917i: 465; Wheeler, W.M. 1932a: 13. Revived status as species and senior synonym of rufinasis: Creighton, 1950a: 365. See also: Eisner & Wilson, 1952: 47.