Polyergus breviceps

Distribution
This taxon was described from the United States.

Nomenclature

 *  breviceps. Polyergus rufescens subsp. breviceps Emery, 1893i: 666 (w.) U.S.A. Raised to species: Kannowski, 1956: 185; Wheeler, J. 1968: 163. Senior synonym of bicolor, umbratus: Wheeler, J. 1968: 163. Material of the unavailable names fusciventris, montezuma, silvestrii referred here by Creighton, 1950a: 559. See also: Hölldobler, 1985: 225.
 * bicolor. Polyergus rufescens subsp. bicolor Wasmann, 1901: 369 (w.q.m.) U.S.A. Junior synonym of breviceps: Wheeler, J. 1968: 163.
 * umbratus. Polyergus rufescens subsp. umbratus Creighton, 1950a: 560 (w.) U.S.A. [First available use of Polyergus rufescens subsp. breviceps var. umbratus Wheeler, W.M. 1915b: 419; unavailable name.] Junior synonym of breviceps: Wheeler, J. 1968: 163.