Subspecies and Distribution. O. a. arenicola Mearns, 1896 — SE Arizona, SC New Mexico, and W Texas, USA (type locality — 6-0 mi above El Paso, Texas, USA). O. a. canus Merriam, 1904 — portions of Aguascalientes, Durango, San Luis Potosi, and Zacatecus, Mexico (type locality — San Juan Capistrano, Zacatecus, Mexico). O. a. surrufus Hollister, 1914 — portions of San Luis Potosi, and Tamaulipas, Mexico (type locality — Miquihuana, Tamaulipas, Mexico). in Cricetidae

Subspecies and Distribution. O. a. arenicola Mearns, 1896 — SE Arizona, SC New Mexico, and W Texas, USA (type locality — 6-0 mi above El Paso, Texas, USA). O. a. canus Merriam, 1904 — portions of Aguascalientes, Durango, San Luis Potosi, and Zacatecus, Mexico (type locality — San Juan Capistrano, Zacatecus, Mexico). O. a. surrufus Hollister, 1914 — portions of San Luis Potosi, and Tamaulipas, Mexico (type locality — Miquihuana, Tamaulipas, Mexico).