The range here ascribed to _osgoodi_ is in that part of the eastern Utah desert that is bounded on the east by the Green and Colorado rivers, on the west by the high mountains of central Utah, on the north by the Book Cliffs and on the south by the Dirty Devil River. This area is an uninviting wasteland in which there are relatively few roads and little water. In addition, it is greatly cut up by washes and gullies which contain water only during a few weeks of the year. The continuation of this area of wasteland southward beyond the Dirty Devil River is inhabited by pocket gophers belonging to the subspecies _absonus_. If specimens were available they would undoubtedly show intergradation to exist between _osgoodi_ and _absonus_. _Specimens examined._--Total, 14, distributed as follows: _Carbon County_: 1-2 mi. N Spring Glen, 6,150 ft., 2; Spring Glen, 6,200 ft., 2; 2 mi. E Spring Glen, 6,200 ft., 1. _Emery County_: Price River, 2 mi. SE Woodside, 4,600 ft., 2 (C. M.); Green River, 4,080 ft., 5 (M. V. Z.). _Wayne County_: Hanksville, 2 (U. S. N. M.). =Thomomys bottae howelli= Goldman _Thomomys bottae howelli_ Goldman, Journ. Washington Acad. Sci., 26:116, March 15, 1936. _Type._--Female, adult, skin and skull, No. 25684, U. S. National Museum (Biological Surveys Collection); Grand Junction, 4,600 ft., Mesa County, Colorado; November 7, 1895; collected by A. H. Howell; original number 493 (after Goldman, type not seen). _Range._--In the valleys of eastern Utah, east of the Green River and north of the Colorado River. _Diagnosis and Comparisons._--Inasmuch as there is but one specimen, the holotype known, and as it was impossible to study it, the following diagnoses and comparisons are from Goldman, (1936:116). "_General characters._--A rather large, pallid subspecies with a broad, flattened cranium. Similar to the palest specimens of _Thomomys bottae aureus_ of the San Juan River Valley, southeastern Utah, in color, but underparts more thinly overlaid with buffy white, and cranial characters, especially the broad, flat braincase, distinctive. Approaching _Thomomys bottae osgoodi_ of the Fremont River Valley, Utah, in color, but much larger and skull widely different. "_Color._--Type (winter pelage): Upper parts in general between tilleul buff and pale olive buff (Ridgway 1912), somewhat darkened on head by a mixture of cinnamon buff and brown; a few inconspicuous dusky-tipped hairs along median line of back; muzzle dusky; ears and postauricular spots deep, contrasting black; underparts thinly overlaid with buffy white, the hairs becoming pure white to roots on inguinal region; thighs pure white to roots all around; feet white; tail buffy whitish, slightly paler below than above.