barbatus. Myrmica barbata Smith, F. 1858b: 130 (q.) MEXICO. Mayr, 1870b: 971 (w.); Mayr, 1887: 610 (m.); Wheeler, W.M. 1900b: 20 (l.); Taber, Cokendolpher & Francke, 1988: 51 (k.). Combination in Pogonomyrmex: Mayr, 1868b: 170. Senior synonym of molefaciens: Mayr, 1886c: 365; Creighton, 1950a: 119; Cole, 1968: 56; of nigrescens: Cole, 1968: 56. See also: Wheeler, G.C. & Wheeler, J. 1953a: 107; Petralia & Vinson, 1980: 381; Smith, D.R. 1979: 1353.