150 Nelson Descriptions of New Squirrels from Mexico. 



with broad median area bright ochraceous bordered with black and edged 

 with white. 



Measurements of type Toted length, 535 ; tail vertebrae, 273 ; hind foot, 69. 



Skull characters. Skull smaller and lighter than in S. p. hernandezi ; 

 bailee smaller ; outer end of nasals broadened, producing an inflated tip. 



Number of specimens examined. Five. 



General notes. The brighter colors of the nape and rump patches, the 

 paler back, the reddish color of basal parts of hairs on tail, and the buffy 

 underparts make a combination of characters which easily distinguish 

 this form from its allies. One of these five specimens before me has the 

 underparts pure white ; and a half-grown specimen has the underside of 

 the tail dull yellowish gray. The rump and nape patches while distinct 

 are scarcely darker than the underside of the tail. \ 



