PEROMYSCUS. 125 



pelage white. Tail, above like dorsal stripe, below white. Feet 

 white. 



Measurements. Total length, i68; tail vertebr;i', 74: hind leg, 21. 



a.—noveboracensis. {Mus), Fischer, Syn. Mamm., 1829, p. 318. 



myoides. {Cricetus), Gapper, Zool. Journ., 1830, 5, p. 204. 



mvodes.' {Peroiiiyscus /eueo/<i/s), Rhoads, Proc. Acad. Nat. Scien. 

 Phil., 1897, p. 27. 



Ty/>e locality. " In Novo Eboraco." 



Geogr. Distr. From Lake Simcoe, Ontario, and Digb\', Nova 

 Scotia, south through New York, except in the boreal area of that 

 State. 



Genl. Char. Similar to /'. americanus, dorsal stripe darker, and 

 narrower; and tail more hairy. 



Color. Like P. americanus, but the colors are brighter and the 

 dorsal stripe is usually narrower and darker, being occasionally 

 quite black. Tail bicolor, above black, beneath white. 



Measurements. Total length, 178; tail vertebra-, 76: hind foot, 

 20. Specimen from Hastings, New York. 



b. — deserticolus. {Hesperomys), Mearns, Bull. Aiu. Mus. Nat. Hist., 

 II, 1890, p. 285. 



Type locality. Mojave Desert, California. 



Geogr. Distr. Desert region of Arizona and California. 



Genl. Char. Ears medium; tail long; pelage short. 



Color. Above pale cinereous drab, slightly darker on median 

 line, light fulvous on sides and rump; tail narrowly striped above 

 with dark brown. 



Measurements. Total length, 16S; tail 78.7; hind foot, 20.8. 



c.sonoriensis. (Hesperc>mys), Le Conte, Proc. Acad. Nat. Scien. 

 Phil., 1853, p. 413. 



Type locality. Santa Cruz, Sonora; near boundary line of Mexico 

 and United States. 



Geogr. Distr. Arctic regions to Mexico west of Rocks Moun- 

 tains. 



Genl. Char. Medium, tail short, colors pale. 



Color. Above dark cinereous, mixed with brownish gray ; under 

 parts whitish; feet brownish white. Tail, above dark brown, beneath 

 paler. 



Measurements. Total length, 166; tail vertebra, 69: hind foot, 

 21.5; ear, 20. 



d.—ari zonae. (Sitomys), Allen, Bull. Am. Mus. Nat. Hist., 1894. 

 p. 321. 

 Type locality. Fairbank, .Arizona. 



