68 NEW SPECIES OF AMERICAN QUADRUPEDS. 
fur on the back, from the roots to near the extremi- 
ties, light plumbeous, tipped with light chestnut- 
brown, on the sides with silver-gray; there is a 
broad line of white around the eyes ; a spot of white 
on the hind part of the head, a little in advance of 
the anterior portion of the ears ; the nose is white, 
which color extends along the forehead till above 
the eyes, where it is gradually blended with the 
colors on the back ; the whole of the under surface, 
including the feet and the inner surface of the legs, 
pure white. In the tail the colors are irregularly 
blended with markings of black, light brown, and 
white, scarcely two hairs being uniform in color. 
In general, it may be said, that the tail, when exa- 
mined without reference to individual hairs, is light 
ash at the roots of the hairs ; then a broad, but not 
well defined line of light rufous, then dark brown, 
and tipped with rufous and smoke-gray. 
Length of head and body, 7 inches 11 lines. 
“ tail, (vertebras,) 4 “ 8 “ 
“ “ including fur, 6 “ 0 “ 
Palm and middle fore claw, 1 “ o “ 
Sole and middle hind claw, 1 “ 9 “ 
Length of fur on the back, 0 “ 7 “ 
“ “ at the tip of the tail, 1 “ 10 “ 
Height of ear measured posteriorly, 0 “ 5 “ 
Distance between the orbits, 0 “ 6 “ 
8. Tamias Tomnsendii. Townsend’s Ground 
Squirrel. 
This species bears some resemblance to our com- 
mon ground squirrel of the middle and northern 
