216 Merriam Descriptions of Eight New Pocket Gophers. 



Measurements. Type specimen: total length, 228; tail vertebra, 6V; 

 hind foot, 30. Average of 14 specimens from type locality: total length, 

 217; tail vertebra, 67; hind foot, 29.2. 



Thomomys alpinus sp. nov. 



Type from Mt. Whitney, High Sierra, California. Exact locality, Big 

 Cotton wood Meadows (altitude, 10,000 feet', 8 miles SE. of Mt. Whitney 

 peak. No. |g|f , J ad. U. S. Nat. Mus., Biological Survey Coll. Col 

 lected August 6, 1891, by B. H. Dutcher. Original No. 167. 



General characters. Size rather small ; coloration dark ; similar in gen 

 eral to T. fulvus, but fulvous tints much duller and paler ; skull smaller 

 and less angular. 



Color. Type (in pale pelage) : upper parts between sepia and drab 

 brown, suffused with very pale dull fulvous brown; nose and sides of 

 mouth dusky, the dusky reaching up between eyes ; ears dusky, but with 

 out distinct post-auricular spot; under parts plumbeous, strongly washed 

 with ochraceous buff; throat, fore feet, and tail irregularly white; hind 

 feet white. There is a very much darker pelage in which the tips of the 

 hairs are russet brown. 



Cranial characters. Skull rather small, rounded; zygomata spreading; 

 frontals broad and flat interorbitally ; nasals rather short. The skull of 

 T. alpinus differs from that of T. fulvus in smaller size, shorter and less 

 angular zygomata, shorter nasals, more smoothly rounded braincase, and 

 less pronounced temporal ridges. 



Measurements. Type specimen: total length, 228; tail vertebra, 67; 

 hind foot, 30. Average of 6 specimens from type locality : total length, 

 220.5; tail vertebra, 63; hind foot, 30.2. 



Thomomys nasicus sp. nov. 



Type from Farewell Bend, Des Chutes River, Oregon. No. 79815, J* ad. 

 U. S. Nat. Mus., Biological Survey Coll. Collected Aug. 4, 1896, by E. A. 

 Preble. Original No. 1274. 



General characters. Similar to T. mazama, but slightly paler, and with 

 distinctive cranial characters. 



Color. Upper parts from in front of eyes to tail uniform pale russet 

 fulvous ; under parts dark plumbeous, strongly washed with pale fulvous ; 

 nose and front of muzzle pale dusky ; a dark spot around and behind ear ; 

 fore and hind feet and tail whitish. 



Cranial characters. Skull long and slender, similar to that of T. mazaimi, 

 but rostrum longer ; nasals exceedingly elongated ; zygomata sloping 

 strongly backward ; audital bulhB very small ; temporal ridges distant ; 

 interparietal large and transversely elongated. 



Measurements. Type specimen: total length, 214; tail vertebrae, 69 ; 

 hind foot, 27. 



