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BILLETIX OF WISCONSIN NATURAL HISTORY SOCIETY. YOL. 2. NO. 2. 
My collection contains four albinos of this Mouse, 3 females 
and one male, taken as follows : August 7, September 14, Sep- 
tember 29 and September 30, all in 1899. No other albinos have 
been seen or reported to me. These were taken on the farm, 3 in 
one field and the fourth one fully half a mile distant. 
Microfus ausicrus (Prairie ]\Ieadow \'ole). 
Of this A'ole I have a single record, one taken by a friend on 
April 26, 1896, Xo. 102 1, who, noting its color, thought it might 
be something desirable to me. Xot being at home at the time it 
was put in a jar of alcohol. Subsequently it was removed and a 
skin prepared. It was labelled "Taken on land," by which I 
infer that the collector wished to state that it was not taken in 
timberland or on the marshes. 
It should occur commonly within our county and probably 
does in some localities not yet visited by me. 
Sciuroptcrus zvlans (Flying Squirrel).. 
This form of the Flying Squirrel is common about Beaver 
Dam, making its home within the recesses of hollow trees and in 
old woodpecker excavations. 
They sometimes congregate in large numbers in some snug 
retreat, to pass the winter. An instance of 22 being found in one 
hollow oak is recorded by the writer in The Oregon Xattiralisf of 
January, 1897. 
Seiiinis hidovicianus (^^'estern Fox Squirrel). 
In the immediate vicinity of Beaver Dam this is the only 
Squirrel which can be classed as common. They may be found 
inhabiting nearly every bit of timberland, and sometimes even in 
groves of not more than 50 trees. 
In winter they make their homes within some hollow tree, in 
a great nest of dry leaves, where they lie curled up in severe 
weather, but on warm days may be seen running about, digging 
in the snow for food. In the spring, when the oak leaves have 
reached their full development, the Squirrel builds a huge leaf 
nest in some tree, usually near the top, in which the baby squir- 
rels are born, and to which the parents repair for their night's rest 
and sleep. 
Two black ones were killed in Trenton township some 15 vears 
ago, and I frequently saw one black one during the winter of 
