FIELD BOOK OF MAMMALS 



Lower California to near Cape San Lucas. Upper and 

 Lower Sonoran Zones." (Goldman) 

 Yellow Wood Rat. — Neotoma intermedia gilva Rhoads. 



Paler than typical intermedia, with more yellow and less 

 black on upperparts. Upperparts from creamy buff to pale 

 ochraceous buff, thinly sprinkled with black-tipped hairs 

 along back; sides clearer; less dusky on "ankles" than in 

 intermedia; tail above, brownish gray, below, white; under- 

 parts white. Total length, 13.2 inches; tail vertebras, 6.4 

 inches; hind foot, 1.36 inches. Found on "Arid plains and 

 basal slopes of mountains mainly along the eastern border of 

 the range of N. intermedia, from Stanley in Fresno County, 

 Cal., south through northeastern Lower California to the 

 Santa Clara Mountains on the west side of the peninsula. 

 Lower Sonoran Zone." (Goldman) 



Mexicana Group 



Mexican Wood Rat. — Neotoma mexicana mexicana Baird. 

 "Size medium, tail moderately long, bicolor; upperparts 

 grayish. . . . Color. — Fresh pelage: Upperparts grayish 

 buff or buff gray, palest on head, moderately darkened over 

 back by overlying blackish hairs, becoming in worn pelage 

 of old adults somewhat rusty brown ; underparts dull white, 

 the fur everywhere deep plumbeous basally ; feet white ; tail 

 brownish above, white below." (Goldman) Total length, 

 13 inches; tail vertebras, 6 inches; hind foot, 1.36 inches. 

 Found on "Desert ranges along the eastern side of the Sierra 

 Madre in Chihuahua and northwestern Durango, and thence 

 northward in the mountains to western Texas, southwestern 

 New Alexico, and southeastern Arizona. Upper Sonoran 

 and Transition Zones." (Goldman) 



Colorado Wood Rat. — Neotoma mexicana fallax (Merriam). 

 Like typical mexicana in color, but larger in size. Total 

 length, 13.2 inches; tail vertebras, 6 inches; hind foot, 1.32 

 inches. Found in "Mountains of Colorado and northern 

 and central New Mexico. Upper Sonoran and Transition 

 Zones." (Goldman) 



San Francisco Mountain Wood Rat. — Neotoma mexicana pine- 

 torum (Merriam). 

 Color warmer than that of typical mexicana, ochraceous 

 buff instead of grayish buff. Upperparts (October) pale 

 ochraceous buff, sprinkled with black-tipped hairs on back 

 and top of head; rest of pelage as in typical mexicana. 

 Total length, 14.3 inches; tail vertebrae, 6.5 inches; hind 

 foot, 1.46 inches. Found in "Plateau region from San 

 Francisco Mountain, Arizona, north to the Grand Canyon 

 and southeastward along the Mogollon Mesa to the Mogol- 

 lon and Mimbres Mountains in western New Mexico. 

 Transition Zone." (Goldman) 



384 



