colliaei, Allen, Mon. Rod., 1S77, p. 738, (nee Rich). 



Type locality. Fort Whipple, Arizona. 



Geogr. Distr. Arizona. 



Genl. Char. Smaller than .S'. carolinensis; tail as long as head and 

 body; soles naked to heels. 



Color. Above mixed gray, black, white and tawny; the latter 

 predominating; sides and limbs outside grizzled gray and white. 

 Beneath and inside of limbs pure white. Tail above at base gray 

 and white, remainder black mixed with white and fringed broadly 

 with white; beneath tawny in the center bordered with black and 

 fringed with white. 



Measurements. Total length, 478; tail vertebrae, 240; hind foot, 

 58; height of ear, 20. 



n.^huachuca. (Sa't/rus), Allen, Bull. Am. Mus. Nat. Hist., 1894, 



P- 349- 



Type locality. Huachuca Mountains, Arizona. 



Geogr. Distr. Huachuca Mountains, Southern Arizona. 



Genl. Char. Similar to S. arizonensis, but nearly uniform gray 

 above, only a trace of a fulvous dorsal stripe. 



Color. Upper parts gray; dorsal stripe nearly obsolete; sides 

 lighter gray; nape patch pale fulvous; tail above black sprinkled with 

 white, and fringed broadly with white; beneath pale chestnut, bor- 

 dered with black and broadly fringed with white. Under parts of 

 body and limbs pure white. 



Measurements. Total length, 540; tail vertebrae, 265; hind foot, 

 70; ear, 34. 



E. Tamiasciunis, Trouess. 1880. 



J. A. Allen. Revision 0/ the Chickarees or Xorth American Red Squirrels 



{Subgenus Tamiasciurus). Bull. Am. Mus. Nat. Hist., 1898, 



p. 249. 



Premolars, ^^ or ^— i. Skull short, broad, depressed between 

 1— I • I— I . 



orbits, superior outline greatly curved, highest point between post 



orbital processes of the frontal; rostrum short, deep, broad; nasals 



broad, not equal to interorbital width; squamosal process of zygoma 



projecting outward, curving gradually downward. Molar series rather 



heavy comparatively. 



78. hudsonius. (Sciurus), Erxleb. Mamm., 1777, p. 416. 



Type locality. Hudson Strait. 



Geogr. Distr. Boreal North America, Labrador, west to Rocky 

 Mountains, and Alaska. 



