ALLEN I MAMMALS FROM BEAVER COUNTY, UTAH. 121 



8. ONYCHOMYS MELANOPHRYS (Merriam). 



One specimen, in the immature gray pelage, Beaver Creek Hills, 

 Beaver County, July 20. 



9. PEROMYSCUS SONORIENSIS (LeConte). 



Five specimens, adult, Beaver Creek Hills, Beaver County, July 20. 



This is a pale gray-brown mouse indistinguishable from Arizona 

 specimens formerly referred by me (Bull. Am. Mus. Nat. Hist., VII. , 

 1895, 229) to sonoriensis. 



10. NEOTOMA DESERTORUM (Merriam). 

 Four specimens, Fort Cameron, August 6. 



II. MlCROTUS MONTANUS RIVULARIS (Bailey). 



Five specimens, three adult and two young, Beaver Creek Meadows, 

 Beaver County, August 20. 



12. THOMOMYS sp. 



Two specimens, both quite young, Fort Cameron, Beaver Creek, 

 Beaver County, August 8. 



13. LEPUS ARIZONA (Allen). 



One specimen, young of the year, Beaver Hills, Beaver County, 

 August 7. 



14. LEPUS TEXIANUS (Waterhouse). 



Five specimens, Beaver Hills, Beaver County, August 7. One of 

 the specimens is an albino, and, except the white ventral surface, is 

 nearly uniform pale cream-color. 



15. OCHOTONA CINNAMOMEA Sp. nOV. 



Type, No. 434, Mus. Brooklyn Inst. Arts and Sciences, Briggs Meadows (alt. 



11,000 ft.), Beaver Range, Beaver County, Utah, August 20, 1904; George P. 



Engelhardt. 



Similar in a general way to Ochotona schisticeps of California, but differing 

 from it in various cranial characters, and especially in coloration. 



General color above pale cinnamon rufous strongly varied over the median 

 dorsal region with black-tipped hairs ; sides nearly uniform dull cinnamon ; 



