CHAP. XV.] 
THE NEARCTIC REGION. 
147 
Order, Family, and 
Genus. 
No. of j 
Species. 
Range within the Region. 
Range beyond the Region. 
47. Aploeerus 
1 
Northern Rocky Mountains 
48. Capra 
1 
Upper Missouri and Rocky 
Mountains northwards 
Palaearctic 
49. Ovibos 
1 
Arctic America and Greenland 
RODENTIA. 
Munnm 
50. Reithrodon 
5 
N. America to Lat. 39° N. 
Neotropical 
51. Hespevomys 
16 
Temperate N. America 
Neotropical 
52. Neotoma 
7 
Temperate N. America 
53. Sigmodon... 
2 
S. and S. E. States 
54. Arvicola 
27 
Texas and California to Hudson’s 
Bay 
N. United States to Arctic Reg. 
and Greenland 
Palaearctic 
55. Myodes 
3 
N. Pal ?ear c tic 
56. Fiber 
1 
All N. America 
Mexico 
DlPODIDiE. 
57. Jaculm 
1 
Pennsylvania to Canada and Cali- 
fornia 
Saccomyid®. 
58. Dipodomys 
5 
New Mexico to Columbia River 
and Carolina 
59. Perognathus . . . 
6 
New Mexico to British Columbia 
60. Thomomys 
2 
Upper Missouri to Hudson’s Bay 
61. Qeomys 
5 
New Mexico to Alabama and Ne- 
braska 
62. Saccomys 
1 
N. America 
CaSTORIM. 
63. Castor 
1 
N. Mexico to Labrador 
Pahearctic 
SciUM'DiE 
64. Sciurus 
18 
N. America to Labrador 
All regs. but Australian 
65. Sciuropterus . . . 
4 
California & E. States northwds. 
Pahearctic, Oriental 
66. Tamias 
4 
Mexico and Virginia to Canada 
Mexico, N. Asia 
67. Spermophilus ... 
15 
N., W., & Central N. America 
Palaearctic 
68. Oynomys 
2 
Rio Grande to Missouri (Central) 
69. Arctomys 
4 
Virginia and Nebraska, northws. 
N. Palaearctic 
Haploodontid^b. 
70. Haploodon 
2 
California and British Columbia 
Cercolabid,® 
71. Erethizon 
2 
Pennsylvania to Canada, & Paci- 
fic coast 
Lagomyid®. 
72. Lagomys 
1 
Rocky Mountains, 42° to 60° N. 
Lat. 
Palaearctic 
Leporid®, 
73. Lepus 
15 
All N. America to Greenland 
All regs. but Australian 
L 2 
