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CHAPTERS ON THE NATURAL HISTORY 



In New Mexico, I had abundant opportunity to study in nature 

 those elegant forms of United States Sciuridw, the Arizona and 

 Abert's Squirrels. The latter, as to the entire upper parts, are of 

 a grizzly iron gray. Lower halves of inner aspects of ear-tufts, 

 and a median broad stripe from shoulders to near root of tail, of 



FIG. 109. LIFE-SIZE HEAD OF A SPECIMEN OF ABERT'S SQUIRREL. 



Adult Female. 



a brilliant chestnut. Ear-tufts large, composed of straight black 

 hairs. Entire under parts, borders of tail, circumocular stripe, 

 and upper sides of feet, pure white. A rather broad dividing line 

 at either side, between white of under parts and gray above, 



