136 Field Museum of Natural History — Zoology, Vol. XI, 



specimens: Total length, 208 to 230; tail vertebra, 84 to 96; hind 



foot, 31 to 32 mm. 



The Little Chipmunk is common in northern and central Wisconsin 

 at least as far south as Juneau County,* but does not occur in southern 

 Wisconsin or Illinois. It is easily distinguished from the larger Chip- 

 munk by its small size and narrower and more conspicuous stripes. 

 Its most common note is a sharp "chip," somewhat resembling that 

 of the larger species, but higher in pitch and more shrill. When fright- 

 ened it often utters a shrill whistle. Its habits appear to be much the 

 same as those of its larger relative, Tamias striatus griseus. There is 

 no doubt that this species hibernates in winter but it does not retire 

 to its winter home until quite late in the season, and its sleep is not so 

 prolonged as that of some of its relatives. Mr. Ernest T. Seton writes, 

 "In August and September the little Chipmunk emulates its cousin 

 in labouring for the rainy days to come. As late as September 26 at 

 Fort Resolution I saw one carrying home great bulging pouchfuls of 

 skunk-grass seeds. About the end of the month, it finally plugs its 

 doorway against the cold, the wet and the Least Weasel, and curls up 

 for its six months' sleep." (/. c, p. 371.) 



Mr. Gerrit S. Miller found this species very abundant on the north 



Map showing approximate range of tlie Little Ch\-pm\xnk. [Etilamias borealis negleclns); replaced 

 from the Dakotas westward by Eulamias borealis; no other representative of this genus occurs in 

 eastern United States. 



* The Field Museum collection contains 8 specimens of this subspecies from 

 Camp Douglas, Juneau County, Wisconsin. 



