_Thomomys bottae centralis_ Goldman, Proc. Biol. Soc. Washington, 48:156, October 31, 1935; Hall and Johnson, Proc. Utah Acad. Sci. Arts and Letters, 15:121, 1938. _Type._--Male, adult, skin and skull, No. 41688, Museum of Vertebrate Zooelogy, University of California; 2-1/2 mi. E Baker (1-1/4 mi. W Nevada-Utah boundary on 39th parallel), 5,700 ft., White Pine County, Nevada; May 30, 1929; collected by E. Raymond Hall; original number 2683. _Range._--Extreme western Utah, in Millard, Beaver and Iron counties. _Diagnosis._--Size medium (see measurements); tail long; claws on front feet long. Color: Near Cinnamon Buff on upper parts, darker in middorsal region, grading to Pinkish Buff on underparts, more accentuated in pectoral and inguinal regions; nose, cheeks and postauricular patches grayish black; front and hind feet and distal half of tail white. Skull: Robust and moderately ridged; zygomatic breadth about the same for entire length of arches; jugals vertical posterior to middle; moderate thickening present at region of maxillo-jugal suture; interpterygoid space narrowly V-shaped; dorsal frontomaxillary sutures convex medially; lacrimal processes globose and well developed; nasals long and with distal denticulations; paroccipital processes well developed. _Comparisons._--Compared with topotypes of _Thomomys bottae albicaudatus_, _centralis_ differs as follows: Size larger; tail longer; claws on front feet longer. Color: Lighter throughout, Cinnamon Buff as opposed to near (13''''_n_) Black. Skull: Basilar length and length of nasals greater; zygomatic breadth less; zygomatic arches thicker at region of maxillo-jugal sutures; interpterygoid space more broadly V-shaped; dorsal frontomaxillary sutures convex medially as opposed to straight; paroccipital processes more developed; zygomatic arches approximately the same width throughout as opposed to widest posteriorly. For comparisons with _Thomomys bottae aureiventris_ see account of that form. _T. b. centralis_ can be distinguished from _Thomomys bottae bonnevillei_, _robustus_, _sevieri_ and _convexus_ by larger size throughout and generally darker color (see accounts of those forms). From _Thomomys bottae stansburyi_ and _tivius_, _centralis_ differs in larger size throughout and lighter color (see accounts of those forms).