2oo 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. (158 to 178 mm.); tail verte- 

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



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 vertebrae, 2.80 to 3.25 in. (70 to 82 

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



