Order VI. Rodentia. 
Fam. l. Seiuridze. 
Subfam. I. Sciurinee. 
34. Sciurus. 
F, Otosciurus. 
79. a.—pheurus (Sciurus), Allen, Bull. Am. Mus. Nat. Hist., 1904, 
0.) 206. 
La CIENAGA SQUIRREL. 
Type locality. La Cienaga, State of Durango, Mexico. 
Genl. Char. Similar to S. durangi, but with a gray instead of a 
reddish back. 
Color. Back gray, slightly suffused with reddish; sides of nose 
gray, sometimes tinged with buff; orbital ring soiled white; black 
lateral line; tail above and below grizzled gray, broadly fringed with 
white; ear at base externally pale reddish brown. 
Measurements. Total length, 493; tail vertebre, 222; hind 
foot, 69. 
79bis. barberi (Sczurus), Allen, Bull. Am. Mus. Nat. Hist., 1904, p. 207. 
BARBER’S SQUIRREL. 
Type locality. Colonia Garcia, State of Chihuahua, Mexico. 
Genl. Char. Similar to S.a. pheurus, but with tail white 
beneath. 
Color. Fall Pelage. Sides of nose and orbital ring soiled white; 
general color of upper parts gray; broad black lateral line; ventral 
surface white; upper surface of hands and feet white; tail above 
black and white mixed, and broadly fringed with white; beneath 
white except at base; ears slightly rufous at base externally; tufts black. 
Measurements. Total length, 500; tail vertebre, 240; hind 
foot, 70. 
35. Tamias. 
A. Eutamias. 
97bis. canescens (Zamuias), Allen, Bull. Am. Mus. Nat. Hist., rgo4, 
p- 208. 
GUANACEVI CHIPMUNK. 
Type locality. Guanacevi, State of Durango, Mexico. Altitude, 
8,000 feet. 
Genl. Char. Like T. dorsalis, but with more strongly defined 
dorsal stripes and sides a deeper fulvous. 
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