xxxvrir 
LIST OF SPECIES. 
Page. 
86. —Sciurus douglassii, Bach.—Oregon Red Squirrel.—San Francisco to Puget’s Sound, 
near the coast. 275 
23. PTEROMYS, Cuvier. 286 
87. —Pteromys volucella, Cuv.(?)—Flying Squirrel.—United States, to the Missouri 
River. 286 
88. —Pteromys hudsonius, Fischer.—Northern Flying Squirrel.—Northern parts of the 
United States from Maine to Minnesota, and north. 288 
89. —Pteromys aipinus, Richardson.—Rocky Mountain Flying Squirrel.—Rocky Moun¬ 
tains?. 289 
90— Pteromys oregonensis, Bach.—Oregon Flying Squirrel.—Near mouth of Columbia 
River to Southern California?. 290 
24. TAMIAS, Illiger. # 291 
91. -—Tamias striatns.—Chipmunk.—Montreal to Virginia, and west to the Missouri. 292 
92. —Tamias quadrivittatus, Rich.—Missouri Striped Squirrel.—Upper Missouri to 
Rocky Mountains, and west to the Cascade Range. Along the Rocky 
Mountains as far south as Fort Staunton, New Mexico. Lat. 33° 30'... 297 
93. —Tamias dorsalis, Baird.—Gila Striped Squirrel.—Fort Webster, New Mexico, 
about Lat. 33.00, Long. 108.00. 300 
94. —Tamias townsendii, Bach.—Townsend’s Striped Squirrel.—From Puget’s Sound to 
Petaluma, California, along and west of Cascade Mountains. 301 
25. SPERMOPHILUS, Cuvier. 304 
a. Otospermophilus , Brandt. 305 
95. —Spermophilus beecheyi, Rich.—California Ground Squirrel.—Coast of California, 
from San Diego to Fort Reading. . 307 
96. —Spermophilus douglassii, Rich.—Columbia Ground Squirrel.—Columbia River, 
from Fort Dalles to its mouth, and south to Klamath Lake. 309 
97. —Spermophilus grammurus, Bachman.—Line-Tailed Squirrel.—Head of Arkansas 
River; along the Rocky Mountains to Sonora. 310 
98. —Spermophilus couchii, Baird, (n. s.)—Black Ground Squirrel.—Northern Mexico... 311 
99. —Spermophilus lateralis, Rich.—Say’s Striped Squirrel.—Rocky Mountains to Cas¬ 
cades, and between about Lat. 38° 25' to northern line of California... 312 
b. Colobotis, Brandt. 306 
100. —Spermophilus harrisii, Aud. & Baclx.—Harris’s Spermophile.—Mohave Desert... 313 
