A PRELIMINARY LIST OF WISCONSIN MAMMALS. 
By Hartley H. T. Jackson. 
The present list of the mammals of Wisconsin is chiefly a re- 
sult of the author's personal investigations in the state, supple- 
mented somewhat by the studies of other mammalogists. The 
author is fully aware of the incompleteness of this paper and looks 
forward to the time when the working mammalogists of Wiscon- 
sin will, together, publish a list which will fully describe the distri- 
bution, habitats, and life histories of the mammals of the state. 
The eastern half of the state has been quite well covered by field 
study but there is room for much careful work in the western and 
northwestern sections, especially along the Mississippi bottom- 
lands, and in the region adjacent to Lake Superior. 
No list of the mammals of Wisconsin has appeared since Moses 
Strong published his "List of the Mammals of Wisconsin", in the 
Geology of Wisconsin (Survey of 1873-1879), Volume i. Chapter 
X, pages 436 to 440. The list has served as a valuable guide to 
mammalogists, but many of Mr. Strong's records are not based 
upon actual examination of specimens, and are very doubtful. A 
few other papers of local and restricted character have been pub- 
lished. 
Many species of mammals which have not yet been taken with- 
in the boundaries of the state may be expected in future collec- 
tions. Particular effort has been made to secure specimens of 
Microtiis pinetorum scalopsoides (Aud. & Bach.), Synatomys 
cooperi Baird, Mephitis mesomelas avia (Bangs.), Putorius long- 
icauda spadix (Bangs), Sorex fumens Miller, Scalopiis aquati- 
cus machrinus (Rafinesque), and others, whose geographical 
distribution it seems should include parts of Wisconsin. There are 
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