196 Fretp Museum or Natura History — Zoétoey, Vor. XI. 
Peromyscus m. eremus Oscoop. (N. Amer. Fauna, No. 28, 1909, p. 47.) Type local- 
ity — Pleasant Bay, Grindstone Island, Magdalen Islands. ‘‘Similar to P. m. 
abietorum, but color darker and tail shorter; similar to P. maniculatus, but paler 
and slightly smaller.’’ (Osgood.) 
Peromyscus m. argentatus (COPELAND & CuurcH). (Proc. Biol. Soc. Wash., XIX, 
1906, p. 122.) Type locality — Grand Harbor, Island of Grand Manan, New 
Brunswick. Color more grayish than either maniculatus or abietorum. 
Peromyscus m. nubiterre (RHOADS). (Proc. Acad. Nat. Sci. Phila., 1896 (1897), 
p. 187.) Type locality —Summit of Roan Mountain, North Carolina, alti- 
tude 6370 feet. Similar to gracilis, but averaging smaller; tail longer than head 
and body. 
Peromyscus gossypinus megacephalus (Ruoaps). 
WESTERN Cotton Mouse. 
Sitomys megacephalus Ruoaps, Proc. Acad. Nat. Sci. Phila., 1894, p. 254. 
Peromyscus gossypinus mississippiensis Ruoaps, Proc. Acad. Nat. Sci. Phila., 
1896 (1897), p. 189. 
Peromyscus gossypinus megacephalus Oscoop, N. Amer. Fauna, No. 28, 1909, p. 
138 (Tennessee, Arkansas, etc.). HOWELL, Proc. Biol. Soc. Wash., XXIII, 1910, 
p. 26 (Illinois and Missouri). 
Type locality — Woodville, Alabama. 
Distribution — Southern Illinois, western Kentucky and Tennessee, 
to northern Alabama, thence through northern Mississippi, eastern 
and southern Arkansas to Oklahoma, eastern Texas and western 
Louisiana. 
Western Cotton Mouse (Peromyscus gossypirus megacephalu 
