VOL. I. | Land Mammals of Z alifarnia. 355 
17. Tamias leucurus Merriam. 
ANTELOPE SQUIRREL.—Californian specimens of this species 
have formerly (prior to 1889) been known as 7amias harrisi (Aud. 
& Bach.) (Harris’s Chipmunk). 
18. Spermophilus grammurus douglassi (Richardson). : 
OREGON GROUND SQUIRREL.—Extends as far south in Califor- 
nia as Sebastopol (F. H. Holmes). I have found this variety com- 
mon in the Russian River valley northward from Healdsburg. 
19. Spermophilus grammurus beecheyi (Richardson). 
CALIFORNIA GROUND SQUIRREL. 
20. Spermophilus beldingi Merriam. 
SIERRA NEVADA SPERMOPHILE.— Previous accounts of .Sper- 
mophilus richardsoni townsendi (Bach.) (Townsend’s Spermophile), 
in California, refer mainly or wholly to this species. 
21. Spermophilus mohavensis Merriam. 
Mojave DESERT SPERMOPHILE.—This species known thus far 
only from the Mojave Desert replaces in California Spermophilus 
tereticaudus Baird (Fort Yuma Spermophile) (?). 
22. Sciurus hudsonius douglassi (Gray). 
DouGLass’s CHICKAREE. 
23. Sciurus hudsonius fremonti (Aud. & Bach.) 
FREMONT’S CHICKAREE. 
24. Sciurus hudsonius californicus Allen. 
CALIFORNIA CHICKAREE.—Distribution unknown beyond the 
fact of its inhabiting Placer County. 
25. Sciurus fossor Peale. 
CALIFORNIA GRAY SQUIRREL. 
26. Sciurus fossor nigripes Bryant. 
BLACK-FOOTED GRAY SQUIRREL. 
27. Sciuropterus volucella hudsonius (Gmelin). 
NORTHERN FLYING SQUIRREL. 
Family HAPLODONTIDAE.  Sewellels. 
28. Aplodontia major Merriam. 
CALIFORNIA SEWELLEL.—Replaces in California Haplodon rufus 
(Raf.) (Sewellel) of earlier writers. | 
‘Family CASTORIDA:. Beavers. 
29. Castor canadensis Kuhl. 
BEAVER. 
