Fes., 1912. MammMats 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, 1; 
Beaver Dam, 14; Spread Eagle, 2; Lac Vieux Desert (Vilas Co.), 
1; (M. P. M.) Keesus Lake, 2; Sumpter, Sauk Co., 1; Milwaukee 
Co., 2; Newport, Door Co., 1; Busseyville, 1; Oconomowoc, 1; 
Kelley Brook, Oconto Co., 3; Prescott, 6; Milwaukee Co., 2; Maiden 
Rock, 10; (O. C.) Nashotah, 2; Milwaukee Co., 5; Fisher Lake, 
Tron Co., 1=61. 
Indiana — La Porte, 1. 
Michigan — Murphy Lake, 1; Park Siding, 2=3- 
Minnesota — Fort Snelling, 4. 
Iowa — Cedar Rapids, Linn Co., 1; (Coe College collection) Cedar 
Rapids, 1=2. 
* Agr. Rept. for 1856, U. S. Patent Office Rept., 1857, p. 72. 
