FEB., 1912. MAMMALS OF ILLINOIS AND WISCONSIN CORY. 197 



Special characters Largest species of the genus, which occurs within 

 our limits; very similar to P. leucopus, but may be distinguished 

 by size. 



Description Middle of back from crown to base of tail dark brown 

 shading to cinnamon brown on the sides; under parts white or 



Map illustrating approximate distribution of the Cotton Mice (Peromyscus gossypinus and 

 races) in eastern United States. 



Peromyscus gossypinus (LECoNTE). (Proc. Acad. Nat. Sci. Phila., VI, 1853, p. 411.) 

 Type locality LeConte Plantation near Riceboro, Liberty Co., Georgia. Gen- 

 eral color darker and size smaller than megacephalus. Does not occur within 

 our limits. 



Peromyscus g. megacephalus (RHOADS). Type locality Woodville, Alabama. 

 Similar to gossypinus, but slightly paler and larger. Description and measure- 

 ments as previously given. 



Peromyscus g. palmarius BANGS. (Proc. Bi6l. Soc. Wash., X, 1896, p. 124.) Type 

 locality Oak Lodge, east coast of Florida opposite Micco, Brevard Co. Smal- 

 ler and paler than gossypinus. 



Peromyscusg. anastasce (BANGS). (Proc. Bost. Soc. Nat. Hist., XXVIII, 1898, p. 

 J 95-) Type locality Point Romo, Anastasia Island, near St. Augustine, 

 Florida. About equal in size to palmarius, but palest of the group. 



