MAMMALS 311 



Key to the United States Species of Neotoma 



El Tail cylindrical and not bushy. 



bi Size large; length more than 320 mm. 

 Ci In the eastern and central States. 



di From Pennsylvania to Alabama N. pennsylvanica. 



6.2 In the Gulf States; Texas to South Dakota N. floridana. 



02 In the far-western States, 

 di Hind feet white. 



ei Not on the Pacific coast; in the States on the 

 Mexican border. 



fi Throat and breast pure white N . micropus. 



N. albigula. 



i-i Throat and breast plumbeous N. mexicana. 



Co In the Pacific coast region N. intermedia. 



do Hind feet dusky N. fuscipes. 



hi Size small; length under 320 mm. 



Ci From California to Utah A^. desertortim. 



Co In Arizona and New Mexico N. lepida. 



a-j Tail flattened and bushy A^. cinerea. 



N. pennsylvanica Stone. Wood or cave rat. Color grayish buff 

 above and white beneath, darkest middorsally; feet white; length 

 430 mm.; tail 198 mm.; hind foot 43 mm.: Appalachian Mountain 

 region from the Hudson River in southern New York to Alabama; 

 Transition zone; nocturnal animals nesting in caves and rocky crevices, 

 where they heap together a great mass of sticks and leaves, in which is 

 the nest; probably omnivorous. 



N . floridana (Ord.), Color pale cinnamon above; underneath parts 

 and feet white; length 409 mm.; tail 189 mm.; hind foot 38 mm.; tail 

 slightly bicolor and scantily haired: southern and central States. 



Subspecies of N. floridana 



N.f. floridana (Ord.). Atlantic coast region from South Carolina to 

 Sebastian, Florida. 



N. f. rubida. Bangs. Color redder: lower Mississippi Valley, 

 northward to Arkansas, and the Gulf coast from Alabama to Texas. 



N. f. illinoensis Howell. Color grayer; tail bicolor: southern 

 Illinois to northern Arkansas. 



A"". /. attwateri Mearns. Color darker and teeth smaller; tail white 

 beneath, sharply bicolor: central Texas to Missouri. 



M. J. haileyi Merriam. Color grayer; fur longer; tail shorter, 

 bicolor: South Dakota to Oklahoma. 



N. micropus Baird. Color pale drab; under parts white; tail 

 blackish above, grayish beneath; length 351 mm.; tail 163 mm.; hind 



