Pheidole xerophila valid U.S.A. (Texas). Nearctic.
Wheeler, W. M. 1908h. The ants of Texas, New Mexico and Arizona. (Part I.). Bulletin of the American Museum of Natural History 24:399-485.   130031

Pheidole xerophila pacifica synonym of Pheidole pilifera U.S.A. (California). Nearctic.
Wheeler, W. M. 1915b. Some additions to the North American ant-fauna. Bulletin of the American Museum of Natural History 34:389-421.   130089

Pheidole xerophila tucsonica obsolete combination U.S.A. (Arizona). Nearctic.
Wheeler, W. M. 1908h. The ants of Texas, New Mexico and Arizona. (Part I.). Bulletin of the American Museum of Natural History 24:399-485.   130031

Pheidole xerophila tucsonica gilvescens unavailable U.S.A. (Arizona). Nearctic.
Wheeler, W. M. 1908h. The ants of Texas, New Mexico and Arizona. (Part I.). Bulletin of the American Museum of Natural History 24:399-485.   130031