A pocket mouse of the Trans-Pecos region of western Texas. The Texas checklist says it favors rocky places in grassland and desert scrub.
The 2019 revision quotes the 1938 diagnosis: the back is tawny-olive washed with black, with an ochraceous-buff line along the side. The underside and feet are white, and the tail is dark above and white below.
The Texas species account says this pocket mouse favors rocky places in grassland and desert scrub, and is most abundant on steep, rocky slopes.
An extinction-risk assessment has not been added yet.