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BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. NO. 2 
at this place. Strange as it appeared to me, fully 75 per cent, of 
these were dead empty shells, from which the animal had decom- 
posed. This would lead one to believe that it was the hard ex- 
terior covering and not the soft animal substance within, which 
the Chipmucks sought for food. 
'My earliest record of the spring appearance of this species is 
[March 9, in 1901, when one was seen to enter a hole in a decayed 
tree stump. At the time the ground was covered with snow and 
we experienced several hard freezes after that date. 
One of their favorite foods is the hazel nut. 
Evotomys gapperi (Red-backed [Mouse). 
Two were seen on November i, 1901,, both under corn shocks 
on the border of a thicket. One of these, a $ , Xo. 1062, was cap- 
tured. 
I have no other record of its occurrence here. 
Zapus hiidsoniiis ( Jumping [Mouse). 
Of this long-tailed, kangaroo-like [Mouse. I have but four 
records : 
First, a living one seen in a meadow near the thicket where 
the Ez'otomys was taken, on July 23, 1889. It was not captured. 
Second, one my father caught in September, 1898, while I was 
in Alaska, and which he laid aside for me. I returned October 
22, at which time it was in such a stage of mortification that I 
could not prepare it. 
Third, one captured on [May 21, 1901, Xo. 969, within 100 
yards of the place the Ez'Ofomys was taken. 
Fourth, one captured October 12, 1901, Xo. 1045, by my 
father, on almost exactly the same spot as the last one. 
All of these were taken on the border, or within 200 feet, of the 
same thicket. 
Peromyscus bairdi ( [Michigan \\'ood [Mouse.) 
This rodent is surpassed in numbers, in my locality, only by 
the Common Vole (Microfiis pennsyk'aniciis) . 
It is abundant with us, frequenting fields, meadows, along rail 
fences, stone walls and in the timberland. If you see an old rail 
fence, overgrown by weeds and hazel bushes, be assured that 
P. bairdi are found there in numbers. Here they have their cozy 
home within some hollow rail. On one occasion I found nine 
adult individuals in one such nest. 
