FEB., 1912. MAMMALS OF ILLINOIS AND WISCONSIN CORY. 133 



burrow, at a more leisure season. I have known lazy people to watch 

 the chipmunks in nutting time, and finding where they carried their 

 stores, dig them out, saying they could thus get nuts faster than by 

 picking them up themselves. In a burrow dug open in November, I 

 found over half a bushel of hickory-nuts and acorns. These were not 

 all in one place, but in four or five enlarged chambers, in different 

 parts of the burrow, which was complicated, and consisted of several 

 winding and intersecting passages, situated not over a foot below the 

 surface. The entrance to the burrow was under a log, and the passages 

 extended several feet on every side. A large nest of leaves and grass 

 was placed above the surface, under the rotten log. Only one of the 

 inhabitants was found but he was quite active. 



"This ground squirrel is sociable; and sometimes, though not always, 

 several pairs occupy the same burrow in winter, the store of food being 

 common property. These, like the true squirrels, stand erect on their 

 hind-feet, when eating, using the fore paws as hands. The power of 

 their incisors is wonderful; they cut with apparent ease through the 

 shells of the seeds of the wild plums, which would resist the point of 

 tempered steel. 



"At times, the note of the chipmunk is a short deep cluck, repeated ly 

 pronounced, without variation; and on a sunny day, he will sometimes 

 utter it for an hour at a time, being meanwhile perched upon a stump or 

 log; but more frequently the note is a shriller chip-chip. When alarmed, 

 he utters a low chatter." * 



Specimens examined from Illinois, Wisconsin and adjoining states: 



Illinois Fox Lake, Lake Co., 13. 



Wisconsin Tomahawk Lake, 4; Camp Douglas, 2; Woodruff, i; 

 Beaver Dam, 14; Spread Eagle, 2; Lac Vieux Desert (Vilas Co.), 

 i; (M. P. M.) Keesus Lake, 2; Sumpter, Sauk Co., i; Milwaukee 

 Co., 2; Newport, Door Co., i; Busseyville, i; Oconomowoc, i; 

 Kelley Brook, Oconto Co., 3; Prescott, 6; Milwaukee Co., 2; Maiden 

 Rock, 10 ; (O. C.) Nashotah, 2; Milwaukee Co., 5; Fisher Lake, 

 Iron Co., i 61. 



Indiana La Porte, i. 



Michigan Murphy Lake, i ; Park Siding, 2 = 3. 



Minnesota Fort Snelling, 4. 



Iowa Cedar Rapids, Linn Co., i; (Coe College collection) Cedar 

 Rapids, 1 = 2. 



*Agr. Kept, for 1856, U. S. Patent Office Rept., 1857, p. 72. 



