1886.] of the Common Eastern Chipmunk. 239 
the auditory meatus. There is an indistinct dark line above the 
light line of the upper eyelid, and a broad, but not well defined, 
dark stripe below the light under eyelid, extending from a point 
anterior to the eye to a point just below the posterior base of the 
ear, where it becomes lost in the grizzled rusty-brown of the sides 
of the neck. Below this stripe, the side of the face is fulvous. 
The crown is dark rust-brown intermixed with a large quantity of 
black hairs, and the same color extends over the anterior half of 
the inner surfaces of the ears, the posterior half being light ful- 
vous or buff. There is a small. light spot behind the base of each 
ear. The shoulders and back between the lateral stripes are very 
dark grizzled iron-gray, with a sprinkling of buff or yellowish. 
The dark stripes are not perfectly clear black, and their ferru- 
ginous borders are not well defined. The median stripe extends 
from the occiput nearly to the root of the tail. The light stripes 
are dark buff intermixed with dark-tipped hairs. The sides are buffy- 
fulvous well sprinkled with black-tipped hairs. The rump, hips, and 
backs of the hind legs are dark rusty-brown. The upper surfaces 
` Of the feet are ferruginous. The upper side of the tail is blackish, 
edged’ with hoary; the under side, deep hazel (almost chestnut), 
bordered with black and edged with hoary. This rich hazel of 
the under tail extends continuously forward over the anal region 
$ the genitals, where it terminates abruptly without shading off 
into the surrounding white. The under parts, from the mouth to 
the genitals, are clear buffy-white. 
Through the kindness of Mr. William Brewster, Curator of 
Mammals and Birds in the Museum of Comparative Zoology at 
Cambridge, Mass., and of Mr. F. W. True, Curator of Mammals 
in the United States National Museum, I have been enabled to 
€xamine the chipmunks contained in these collections. I am 
indebted also to Mr. William E. Saunders for the loan of a speci- 
men from London, Ontario, Canada. These specimens, together 
with my own (which in numbers exceed all the others combined), 
Constitute a very complete series of the Eastern animal from the 
region between Canada on the north and Washington, D. C., on 
the south. a 
: Comparison of representatives from the extremes of this range 
brings to light the following differences: The crown in typical- 
: orthern specimens varies from pale to bright rusty-fulvous, while 
im typical Southern examples it is dark rust-brown. — 
