FEB., 1912. MAmMALS oF ILLINOIS AND WISCONSIN — Cory. 101 
GROUP 3. Length of body, without tail, (nose to root of tail) less than 8 inches. 
SECTION 1. Back marked with several distinct stripes. 
Back with but 2 whitish stripes and 5 black ones; rump rufous chestnut; 
nose to root of tail, about 5 inches; tail vertebrae, 3 to 314 inches. 
Occurs within our limits from northern Illinois southward. 
CHIPMUNK. Tamuias striatus, p. 128. 
Similar to preceding but somewhat larger; general color grayer and rump 
pale cinnamon brown with only a slight rusty tinge; spaces between 
black stripes on back distinctly grayish nearly to the rump; nose to 
root of tail, about 514 inches; tail vertebre, about 314 inches. 
Occurs in northern Illinois and northward throughout Wisconsin. 
Gray CHIPMUNK. Tamaias striatus griseus, p. 130. 
Back with 4 pale stripes and 5 black ones; face with whitish stripe above 
and below the eye; size small; nose to root of tail, about 434 inches; 
tail, about 334 inches. Occurs within our limits only in northern 
Wisconsin. LITTLE CHIPMUNK. 
Eutamias borealis neglectus, p. 135. 
Back with alternating pale and dark brown stripes, each dark stripe with 
row of pale rounded spots down the middle; nose to root of tail, about 
7% inches; tail, about 34% inches. 
STRIPED GROUND SQUIRREL. STRIPED GOPHER. 
Citellus tridecemlineatus, p. 138. 
SECTION 2. Back not marked with several distinct stripes. 
Part 1. Front and hind legs joined together by thickly furred expansion of 
loose skin extending laterally from sides of the body. 
Fur on under parts entirely white to the base; nose to root of tail vertebra, 
about 4 inches; total length, about 94 inches. Occurs throughout 
whole of Illinois and southern two-thirds of Wisconsin. 
FLYING SQUIRREL. 
Sciuropterus volans, p. 102. 
Similar to preceding but larger and fur on under parts tipped with white, 
but plumbeous gray at base instead of all white; nose to root of tail, 
about 614 inches; tail vertebra, about 5 inches; total length, about 
11% inches. NORTHERN FLYING SQUIRREL. 
Sciuropterus sabrinus, p. 106, 
Part 2. Front and hind legs not joined by an expansion of loose skin extend- 
ing laterally from the body. 
Upper parts reddish brown; under parts white or whitish; upper surface 
of tail reddish brown, the hairs near the end subterminally marked 
with black; entire length, including tail vertebre, between 12 and 14 
inches. RED SQUIRREL. CHICKAREE. 
Sciurus hudsonicus loquax, p. 122. 
