Fes., 1912. MammMats 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 
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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 (Ruoaps). Type locality — Woodville, Alabama. 
Similar to gossypinus, but slightly paler and larger. Description and measure- 
ments as previously given. 
Peromyscus g. palmarius BANGs. (Proc. Biol. 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. anastase (BANGS). (Proc. Bost. Soc. Nat. Hist., XXVIII, 1898, p. 
195.) Type locality —Point Romo, Anastasia Island, near St. Augustine, 
Florida. About equal in size to palmarius, but palest of the group. 
