CORNELL UNIVERSITY 
ZOOLOGICAL LABORATORY 
ITHACA, N. Y. 
Oune 3,I933. 
Mr.F.JT.W.Schmidt 
StanelygWi scons6a. 
Dear Mr*Sclmidt, 
I have several times read your interesting acount of 
Clark CoWiso and have noted with some satisfaction that 
you have co*ibuted in no small way to our knowledge of 
the smaller mammals, Your account of the pine mice is 
very enlightening. I am about to make an investigation 
in New York State, where they have become a very serious 
pest to the apple growers, and would like to have your 
methods adopted in securing large series. 
I have only collected a few, none in New York.AUsually 
open the burrow, remove some dirt and place the trap across 
the runway, baited with raisin or unbaited, then coter th 
hole with a piece of cardboard and place ditt over this to 
exclude light. It has usually worked,-but the mice some- 
times, like the moles do invariably, push dirt into the 
trap in their efforts to cover and repair the burrow. 
Any hints you can suggest will be most appreciated. 
I noted you dig holes to trap the animals. Pits are hard- 
ly practical in other than heavyclay-like soil, I have 
fount, as the fossorial mammals can hastily dig out from 
them.Caught about 60 Na aeoza us in two weeks trapping 
last spring, but they are not n the same habitat as the 
pine mice, at least in these parts, and readily fall a 
victim to pits dug for them, even in loose wood soil. 
Any separates relative to mammals or other  erteb- 
vertebrates you may have and can spare, I should be glad 
*o get. 
7 Sincerelyyuro, 
W,  Haml ton#, r,#