519 
There must be, however, considerable movements of individuals 
and couples from place to place. Any place suitable for them they 
are sure to occupy in a short time if they are not molested. 
The fox-squirrel is said not to make so engaging a pet as the 
gray squirrel, nor does it take so readily to living in the immediate 
vicinity of man. 
GRAY SQUIRREL. 
Sciurus carolinensis Gmelin. 
(Syst. Nat., I., 1788, p. 148.) 
NORTHERN GRAY SQUIRREL. 
Sciurus carolinensts leucotis (Gapper). 
Sciurus leucotts Gapper, Zool. Journ., V., 1830, p. 206. 
The gray and the northern gray squirrels are probably both pres- 
ent in the state. They are closely related and have often been con- 
fused. Probably intermediate forms occur in this part of the coun- 
try. 
Both these gray squirrels are smaller than the fox-squirrel, have 
less of the rufous color, and are also distinguished from it by the 
dentition. While the fox-squirrels have but five teeth on each side 
in the upper jaw, the adult gray squirrels have in addition another 
small premolar, making six teeth on each side above. The average 
length of the gray squirrel is about 18 inches (450 mm.) and that of 
the northern gray squirrel is about 20 inches (500 mm.). The color 
of the northern subspecies is given as silvery gray above with under 
parts white, sometimes rusty on neck or chest. The gray squirrel 
is dark yellowish, rusty above, the under parts being white. 
The habits of the two species are essentially alike, and the fol- 
lowing account will appiy to both. 
The various subspecies of the gray squirrel are distributed 
throughout the United States east of the great plains, and are found 
as far north as southern Canada. The southern limit of the sub- 
species leucotis may be indicated by a line extending from the Cats- 
kills south of Pennsylvania in the Alleghany Mountains, and thence 
west through northern Indiana and Illinois. 
Under natural conditions this species chooses wooded swamps 
and river-bottoms, with heavy timber, rather than the edges of the 
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