Fes., 1912. Mammats or ILLinois AND Wisconsin — Cory. 
US 
SG rece] 
KEEWATIN. Zea ee. fl 
Tony try A 
p 
Peromyscus leucopus 
N 
P. 1. noveboracensis 
KR 
a 7 Se <x P. 1. ammodytes 
.? 
LAS . 
Coy (yy >) P. 1. fusus 
F- Se 
i V5, EES 
‘Area of intergradation 
Map illustrating the approximate distribution of the White-footed Mice (Peromyscus leucopus 
and races) in eastern United States. 
Peromyscus leucopus (RAFINESQUE). Type locality — Western Kentucky. Descrip- 
tion as previously given. 
Peromyscus 1. noveboracensis (FISCHER). Type locality — New York. Similar to 
leucopus, but slightly larger'and somewhat paler; pelage longer. 
Peromyscus l. ammodytes Bancs. (Proc. New Engl. Zoél. 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 l. fusus Bancs. (Proc. New Engl. Zoél. Club, IV, 1905, p. 13.) 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. 
