252 Frertp Museum or Naturat History — Zoéroey, Vor. XI. 
paper, and it gnawed all it could reach, and thus spent a large part 
of the night in work. I could hear the work going on when I was awake. 
In the morning it appeared to be reposing on the top of its nest; but 
after watching it for some time, and seeing no motion, I lifted up the 
glass and took the mouse in my hand. It showed no signs of life. I 
now felt that perhaps my pet was indeed really dead; but remember- 
ing what I had previously seen, I resolved to try to restore it again to 
activity. By holding it in my hand and thus warming it, the mouse 
soon began to show signs of life, and although it was nearly the whole 
day in coming back to activity, at last it was as lively as ever, and 
afterward, on being set free in the room it moved about so swiftly by 
means of its long leaps, that it required two of us a long time to capture 
it uninjured.” 
Describing the habits of the Jumping Mouse in northern Illinois, 
Kennicott says: ‘‘It is not very prolific and is nowhere numerous. In 
northern Illinois it is found in the deepest woods, as well as in cultivated 
fields, and on the prairie at a distance from any timber. In the woods 
it is often found nesting in situations similar to those occupied by 
the Mus leucopus. It cannot climb but crawls up the inside of hollow 
trees to a considerable height from the ground, and is sometimes found 
nesting in them; but its nest is often discovered under the bark of 
rotten trees or stumps and, though not much noticed when inhabiting 
these situations, it appears frequently, if not generally, to live in 
burrows in the ground, as it nearly always does in the fields, and on 
the prairies of course. It digs readily. Its burrow in summer is not 
deep, and the nest is sometimes found in a tuft of grass above the 
surface, or under an inverted sod. In cultivated fields, it lives under 
fences and, like the mice and arvicole, takes up its abode in grain that 
has been cut and left standing out. 
“The food of this species appears to consist chiefly of herbaceous 
plants, with their seeds, and the seeds and nuts of trees when it inhabits 
the woods. In cultivated fields, it devours grain, of which it has 
sometimes been observed to collect stores in its burrows” (I. c., p. 96). 
Specimens examined from Illinois, Wisconsin and adjoining states: 
Illinois — Fox Lake, 3; Galena, Jo Daviess Co., 3=6. 
Wisconsin — Beaver Dam, Dodge Co., 5; Conover, Vilas Co., 1; (S. C.) 
Beaver Dam, Dodge Co., 12=18. 
Michigan — Dowagiac, Cass Co., 2. 
