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.
Specimens examined.—Total, 40, all from Utah, distributed as follows: Duchesne County: Red Creek, 6700 ft., 2 mi. N Fruitland, 4 (CM); 10 mi. S Myton, 1 (UU); 20 mi. S Myton, 1 (RH). Uintah County: Vernal, 1 (BYU); 20 mi. E Ouray, 5 (CM); Junction Green and White rivers, 4800 ft., 2 mi. S Ouray, 5 (CM); Pariette Bench, 5000 ft., 8 mi. S Ouray, 8 (CM); Desert Springs, 10 mi. S Ouray, 4 (CM); Pariette Bench, 12 mi. S Ouray, 2 (CM); Jensen, 5 (BYU); E side Green River, 3 mi. S Jensen, 4 (CM).
Dipodomys ordii sanrafaeli [Durrant and Setzer]
Dipodomys ordii sanrafaeli [Durrant and Setzer], Bull. Univ. Utah, 35 (no. 26):26, June 30, 1945.