542 
same corn shock; but I have never found the prairie-mouse > and the 
woodland one living together in such manner. 
This mouse usually builds its nest under stumps, logs, or similar 
cover. Its burrows are little more than passageways under such 
cover, lying, at most, but afew inches under ground. I have never 
found a burrow of fhe species in the open without protection. 
Occasionally the nest is made 1n a wood-pile, or in an old stub or tree 
some feet from the ground. I saw one in a decaying apple-tree four 
feet above the ground. Hoy reports having seen nests at a height 
of eight to ten feet in the branches of thorn-trees (Crategus) in 
southern Wisconsin. The nests are made of leaves, fine grass, etc. 
The food of this species is vegetable matter—seeds, nuts, grasses, 
and herbage. In captivity, according to Merriam, it will eat flesh 
and catch fliesand eat them. Other observers have failed to induce 
them to eat any flesh. They may store up food for winter, as nuts, 
grains, seed, etc., have been found in their storehouses, sometimes 
in considerable quantities. They do not hibernate, but are active 
all winter, and their tracks are often seen in the snow. 
The following table shows the result of an examination of fifty- 
five females. 
Date eee | Condition of female. 
aie Fala ae | 37921 | Parturition shortly before. 
Varig as ai h 30922 Four embryos—full grown. 
eho ee le tia | Svi923 Two embry os—full grown 
Aer ea es: | 37931 | Uterus shrunken and empty. 
iaiaent Date oe 37932 Uterus small, empty. 
Jane 2am: 37933 Three small embryos. 
aig G2 ott 37934 Uterus small, empty. 
Jane a2 nae 37936 Uterus small, empty. 
ane tere 37939 Uterus small, empty. 
lamer aes | 37941 Recent parturition. 
janes een | 37954 Uterus small, empty. 
sieamTas Sots ae 37955 Uterus small, empty. 
Bebra Aer cn | 38342 Uterus medium-sized, empty. 
NOI eA gy a 37983 Three embryos—size of peas. 
day Oneill cher oe tees | S29 80 Uterus swollen, empty. 
COE MUG a eee s199" Four embryos—nearly grown. 
Maye Tir 2 13829 Four embryos—three-fourths grown. 
