200 Field Museum of Natural History — Zoology, Vol. XI. 



Special characters — The golden brown color of the upper parts will readily 

 distinguish it from others of the genus, which occur within our limits. 



Description- — Upper parts bright tawny brown or "golden brown," 

 middle of the back tinged with darker brown; under parts cream 

 white, often showing a faint tinge of tawny buff; hairs on under parts 

 (except throat) with concealed bases plumbeous slate color, the 

 tips white; face about the same color as sides, without any blackish 

 marking; feet cream white; tail dark brown above, white beneath. 



Measurements — Total length, 6.25 to 7 in. (i 58 to 178 mm.) ; tail verte- 

 brae, 2.80 to 3.25 in. (70 to 82 mm.); hind foot, .75 in. (19 mm.). 



Peromyscus nutlalli 



OF /y\E 



'Area of Intergradatlon 



Map illustrating approximate distribution of the Northern Golden Mouse [Peromyscus nuttalli) 

 and the Southern Golden Mouse (P. n. aureolus). 



Peromyscus nuttalli (Harlan). (Month. Amer. Journ. Geol. & Nat. Sci., Phila., 

 1832, p. 446.) Type locality — Norfolk, Virginia. Similar to aureolus, but 

 averaging larger, with somewhat larger skull and molar teeth. Total length, 

 6.87 to 7.50 in. (175 to 190 mm.); tail vertebrae, 3.25 to 3.65 in. (82 to 93 mm.). 



Peromyscus n. aureolus (AuD. & Bach.). Type locality — Oak forests of South Caro- 

 lina. Averaging smaller than nuttalli. Description as previously given. Total 

 length, 6.25 to 7 in. (158 to 178 mm.); tail vertebras, 2.80 to 3.25 in. (70 to 82 

 mm.). Occurs within our limits in southern Illinois. 



