WHITE-FOOTED MOUSE 



Buff-breasted Canyon Mouse. — Peromyscus crinitus auripec- 



tus (Allen). 

 Resembling typical crinitus, but lighter colored and with 

 more buff; tail heavily haired. Upperparts rich ochraceous 

 buff with faint sprinkling of dusky on dorsal area, 1 ss dusky 

 on sides; ochraceous buff on head, face, and often on pec- 

 toral area; hands and feet white; tail dusky brownish above, 

 white below; ear tufts buffy with occasional mixture of 

 white; underparts creamy white. Total length, 7-7.3 

 inches; tail vertebree, 3.6-3.9 inches; hind foot, .80-84 

 inch; ear from notch (in dry specimen), .66-. 72 inch. 

 "Known from a limited number of localities in northeastern 

 Arizona, southeastern Utah, and adjacent parts of Colorado 

 and New Mexico." (Osgood) 

 Stephens Canyon Mouse; Palm Desert Mouse. — Peromyscus 



crinitus Stephen si (Alearns). 

 Smaller and paler than auripectus. Upperparts pale ochra- 

 ceous buff uniformly mixed with dusky brownish; a nar- 

 row buff lateral line; underparts white to creamy white, 

 buff pectoral spot may or may not be present. Total 

 length, 6.5-7.7 inches; tail vertebrse, 3.5-4.3 inches; hind 

 foot, .76-.80 inch; ear from notch (in dry specimens), .62- 

 .66 inch. Found in "Rocky situations in the Lower Sonoran 

 Zone from northeastern Lower California northward to the 

 desert valleys and ranges of the Death Valley region and 

 eastward across southern Nevada to southwestern Utah and 

 northwestern Arizona." (Osgood) 



Califomicus Group 



Parasitic Mouse. — Peromyscus califomicus califomicus 

 (Gambel). Plate XXX. 

 Largest Peromyscus found in the United States, total length 

 reaching 10 inches or more. Pelage long and soft; tail more 

 than half total length, well haired but not enough to com- 

 pletely conceal annulations; ears very large and mem- 

 branous, thinly haired; soles of hind feet naked or very 

 nearly so. Upperparts russet to cinnamon mixed with 

 considerable blackish or dark brownish, slightly darker on 

 dorsal area; sides brighter than back; head brownish, 

 cheeks bordered by light russet line below; orbital ring 

 dusky; hands and feet white, the latter with short, dusky 

 stripe reaching down from hind leg; tail bicolored but no 

 sharp contrast between black of upperside and white of 

 lower, base of tail russet below; underparts creamy white. 

 Total length, 9.5-10.4 inches; tail vertebras, 5.1-5.8 inches; 

 hind foot, i. 04-1. 16 inches; ear from notch (in dry speci- 

 mens), .85-.94 inch. Found in "Upper Sonoran and Tran- 

 sition Zones of the coast region of California from San 

 Francisco Bay south to the vicinity of Santa Barbara, 

 where intergradation with subspecies insignis occurs." 



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