410 



BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



PEROMYSCUS ARIZONJE (Allen). 

 APACHE WOOD MOUSE. 



Sitomys amencanus arizonse Allen, Bull. Am. Mus. Nat. Hist., VI, Art. XIII, Nov. 7, 



1894, pp. 321, 322 (original description); VII, p. 229, June 29, 189.5. 

 [Peromyscus amencanus] arizonsp, Elliot, Field Col. Mus., Zool. Ser., II, 1901, p. 125 



(Synop. Mam. N. Am.). 

 Peromyscus texanus arizonse, Miller and Rehn, Proc. Bost. Soc. Nat. Hist., XXX, No. 



1, Dec. 27, 1901, p. 84 (Syst. Results Study N. Am. Mam. to close of 1900). 

 [Peromyscus tejcensis'] arizome, Elliot, Field Col. Mus., Zoo!. Ser., IV, 1904, p. 186 



CMam. Mid. Am.). 



Type-locality. — Fairbank, about 20 miles north of tlie Mexican 

 Border, on tlie San Pedro River, in Cocliise County, Arizona. (Type, 

 skin and skull, in the American Museum of Natural History.) 



Geograpliical range. — The habitat of Peromyscus arizonse is the 

 wooded banks of streams of the Elevated Central Tract. Specimens 

 were taken on the San Bernardino, San Pedro, and Santa Cruz rivers, 

 along the Boundary Line; and on the Verde River, in central Arizona. 



Fig. 8t;.— Peromyscus arizon.b. Skull, a. dors.^l view; b, ventral view; r, lateral view- 



At present it is known only from the wooded streams of Sonora and 

 Arizona, never having be^n taken in open or rocky country, away 

 from water. 



Description. — A large, rather stout mouse. In winter the upper 

 surface is tawny w^ood brown, mixed with gray and black; middle^ 

 area above considerably darker than the sides; feet and under parts 

 pure white; under pelage slate-gray; tail sharply bicolor, clove brown 

 above, wliite below; ears scantily clothed, drab, without distinct 

 hoary edging. In summer the coat is drab, lacking the tawny shade 

 of winter; and the under surface shows much of the gray basal por- 

 tion of the hair between the narrow points. The young are mouse 

 gray, and may be born at any season of the year, those of winter hav- 

 ing longer pelage than in summer. The mammae are !—«. Length, 

 185 mm. ; tail vertebrae, 85; hind foot, 23. Skull (fig. 86) , 28 by 14.5. 



Remarlcs. — The nearest relative of tliis species is the Peromyscus 

 tornillo, from wliich it is separated, on the Boundary Line, by the San 



