48 
48. BANGS’ POCKET MOUSE. Perognathus panamintus 
bangsi. 
Valleys of the eastern slope of the mountains. Not common. 
49. SAND POCKET MOUSE. Perognathus panamintus 
arenicola. 
Western border of the Colorado Desert. Rare. 
50. PACIFIC POCKET MOUSE. Perognathus pacificus. 
A very small species. The four known specimens were taken 
within a mile of the sea in this county. 
51. BAILEY POCKET MOUSE. Perognathus baileyi. 
Eastern slope of the mountains near the border. Rare. 
52. LONG-TAILED POCKET MOUSE. Perognathus 
formosus. 
Valleys of the eastern slope of the mountains. Not common. 
93. TUFT-TAILED POCKET MOUSE. Perognathus 
penicillatus. 
Abundant in places in the Colorado Desert and in the valleys 
of the eastern slope of the mountains. 
54. SHORT-EARED POCKET MOUSE. Perognathus fallax. 
Rather common in the western foothills and thence to the 
sea, 
55. PALLID SHORT-EARED POCKET MOUSE.  Perog- 
nathus fallax pallidus. 
Eastern slope of the mountains. Rather common in rocky 
ground. 
56. DARK POCKET MOUSE. Perognathus californicus 
femoralis, 
Foothills and western slope of the mountains. Not common. 
57. SPINY POCKET MOUSE. Perognathus spinatus. 
Foothills and low mountains bordering the Colorado Desert. 
Usually found in rocky places. Seldom common, 
Family LEPORID/E, Hares and Rabbits. 
A rather large family of some economic importance, partly 
because of the value of their flesh for food, and partly because 
of the damage occasionally done to crops and fruit trees. Their 
food is vegetable, mostly the leaves, stems, branches and bark 
of plants and shrubs, which are bitten off and eaten on the spot. 
The young of Rabbits are born blind and hairless in underground 
nests, while those of Hares are well haired at birth and can see 
and very soon can take care of themselves. 
58. SAN DIEGO JACK RABBIT. lLepus californicus ben- 
netti. 
Common from the sea to the pine forests. 
59. COLORADO DESERT JACK RABBIT. Lepus cali- 
fornicus deserticola. 
More or less common from the eastern slope of the mountains 
to the Colorado River. This light-colored subspecies is subject 
