_Diagnosis._--Size large (see measurements); hind foot short. Color dark; entire dorsal surface, near (_c_) Cinnamon-Buff, purest on sides and flanks, with moderate suffusion of black on upper parts; cheeks white; arietiform markings, pinnae of ears, plantar surfaces of hind feet, dorsal and ventral stripes of tail, brownish. Skull large; frontomaxillary suture convex mediad; lacrimal process large; styloid process projects, on ventral surface of tympanic bulla, beyond middle of external auditory meatus; nasals flared distally. _Comparisons._--From _Dipodomys ordii priscus_, _D. o. uintensis_ differs in: Hind foot shorter; color darker; styloid process projects on ventral part of tympanic bulla well anterior to middle of external auditory meatus as opposed to projecting to middle; depth of foramen magnum, expressed in percentage of width across posterior margin of occipital condyles, greater (86 per cent in _D. o. uintensis_ and 81 per cent in _D. o. priscus_); frontomaxillary suture convex mediad as opposed to nearly straight; lacrimal processes larger; nasals more flared distally. From _Dipodomys ordii nexilis_, _D. o. uintensis_ differs as follows: Size smaller; color lighter; interorbital breadth greater; frontomaxillary suture convex mediad as opposed to concave; lacrimal processes larger; nasals more flared distally; narrower across auditory bullae; basal length greater; zygomatic arches bowed laterad as opposed to relatively straight. From _Dipodomys ordii longipes_, _D. o. uintensis_ differs as follows: Size smaller; color darker; auditory bullae wider, longer and deeper; frontomaxillary suture convex mediad as opposed to nearly straight; greatest breadth across auditory bullae less. For comparison with _Dipodomys ordii sanrafaeli_ see account of that subspecies. _Remarks._--This large, rather dark race inhabits the desert valleys of the White, Green and Duchesne rivers in northeastern Utah. The race nearest geographically, as well as morphologically, is _Dipodomys ordii priscus_. Intergradation occurs with the latter subspecies at Vernal, Uintah County, in cranial measurements and in color. On the basis of color alone _D. o. uintensis_ can be distinguished from _D. o. sanrafaeli_, the geographic race to the south. Specimens from Jensen are intermediate in color and cranial measurements between _Dipodomys ordii nexilis_ and _D. o. uintensis_ but are referable to the latter.