Feg., 1912. MamMats oF ILLInoris AND WIsconsIN— Cory. 137 
shore of Lake Superior. He writes, ‘“‘Although it is universally dis- 
tributed outside of thick woods at Nepigon and Peninsula, the little 
chipmunk shows a marked preference for open rocky hillsides, while 
the big chipmunk prefers the edge of the forests, where stumps and 
logs furnish it a more congenial shelter. . . . While T. striatus on 
the north shore of Lake Superior hibernates near the end of September, 
immediately after the first heavy frosts, T. guadrivittatus remains active 
much later — probably until the snow cuts off its food supply. The 
small chipmunk was actively running about in the light snow during 
the second week of October, 1896, although the temperature during 
the day averaged about 15° F. On October 23, I found an adult female 
in a nest built of feathers and soft vegetable fibers at the end of a 
tunnel under a clump of bearberry. The tunnel was about two feet 
long and terminated a foot or more beneath the surface in a chamber 
about the size of a cocoanut. The chamber was completely filled by 
the nest, which contained, in addition to its occupant, a small store of 
seeds of various weeds and wild fruits.” (J. c., p. 31.) 
Specimens examined from Wisconsin and adjoining states: 
Wisconsin — Camp Douglas, Juneau Co., 8; Lac Vieux Desert, Vilas 
Co., 7; Conover, 1; (M. P. M.) St. Croix Dam, Douglas Co., 5; 
Pembine, 1; Divide, Vilas Co., 1; Marinette, 10; Upper St. Croix 
Lake, 5; Yellow River, Burnett Co., 5; Mouth Namekagan River, 
1; Cataline, 3; Kelly Brook, Oconto Co., 5; (O. C.) Fisher Lake, 
Iron Co., 2= 48. 
Michigan — Park Siding, 12; Sevey, 1=13. 
SuBrFAMILY MARMOTIN. 
Genus CITELLUS Oken. 
Citellus Oken, Lehrb. der Naturg., Zool., II, 1816, p. 842. Type Mus 
citellus Linn. 
Form squirrel-like, but tail less bushy; color pattern variable; 
cheek pouches developed; hind feet with five developed toes; front feet 
with four developed toes and a rudimentary thumb. Skull relatively 
heavier than that of Sciurus; postorbital processes slender and spine- 
like; upper premolars two, the first much smaller than second; ante- 
orbital foramen round or oval with tubercle on outer lower edge. Two 
species belonging to this genus occur in Ilinois and Wisconsin. 
aes Pm. oo M. 37359, 
I-1 
Dental formula: I. aa C. rae rere qs 
