Feb., 191 2. Mammals of Illinois and Wisconsin — ^ Cory. iJ 



OF iy\e 



^' 'N 



Area of intergradatlon 



Map illustrating the approximate distribution of the White-footed Mice {Peromysciis leiuopus 

 and races) in eastern United States. 



Peromyscus leucopus (Rafinesquej. Type locality — Western Kentucky. Descrip- 

 tion as previously given. 

 Peromyscus I. noveboracensis (Fischer). Type locality — New York. Similar to 



leucopus, but slightly larger and somewhat paler; pelage longer. 

 Peromyscus I. ammodyles Bangs. (Proc. New Engl. Z06I. Club, IV, 1905, p. 14.) 

 Type locality — Monomoy Island off coast of southeastern Massachusetts. 

 Similar to noveboracensis, but under parts pure white to roots of hairs. 



Peromyscus I. fusus Bangs. (Proc. New Engl. Z06I. Club, IV, 1905, P- I3-) Type 

 locality — West Tisbury, Island of Martha's Vineyard, off south coast of 

 Massachusetts. Similar but averaging larger than noveboracensis, and rostrum 

 of skull slightly more elongated. 



