Merriam — Four New Rodents from California. 147 



Color. — Muzzle and inner side of opening of cheek pouches usually 

 dusky; winter pelage dusky, lightly washed with sepia brown, sometimes 

 becoming ochraceous on sides of neck; summer pelage varying from dull 

 russet brown to almost ochraceous, brightest on sides of neck and (less so) 

 on Hanks. 



Cranial characters. — Skull resembling that of alpinus but much smaller; 

 nasals small and narrow anteriorly, with sides nearly parallel; interpar- 

 ietal broader than long; zygomata not broadly spreading, broadest pos- 

 teriorly; bullae small and smoothly rounded, lacking the antero-external 

 prominence of alpinus; occiput bulging. 



Measurements. — Type specimen, 9 ad.: Total length, 104; tail vertebrae, 

 54; hind foot, 28. An adult male from type locality: Total length, 194; 

 tail vertebrae, 09; hind foot, 27. 



