Fes., 1912. MamMats or ILLiInois anp Wisconsin — Cory. 117 
The Northern Gray Squirrel inhabits the more heavily wooded 
portions of northern Illinois and Wisconsin. Its true home is in groves 
Black phase. Normal phase. 
orthern Gray Squirrel (Sciurus carolinensis leucolis). 
of hard wood timber, where it makes its nest both in hollow trees and 
outside among the branches. When the latter kind is constructed, 
