LIST OF SPECIES. 
21 
Page. 
25. SPERMOPHILUS, Cuv. 304 
16. —Spermophilus macrourus, Bennet.—West Coast of Mexico. (Not belonging to tbe 
United States.). 32T 
21. ARCTOMYS, Scbreb. 338 
17. —Arctomys pruinosuSj Grmelin.—Hoary Marmot; Wliistler.—Hudson’s Bay to 
Northwest coast of America. 345 
18. —Arctomys lewisii, Aud. & Bacli.—Lewis’ Marmot.—Columbia River?. 347 
32. THOMOMYS, Max. 388 
19. —Thomomys talpoides, Giebel.—Mole G-opher.—Hudson’s Bay. 403 
33. DIPODOMYS, Gray. 406 
20. —Dipodomys wagneri, Leconte.—South Carolina(!) (Very doubtful). 415 
21. —Dipodomys heermaniui, Leconte.—Sierra Nevada, California. 415 
37. REITHRODON, Waterb. 447 
22. —Reithrodon carolinensis.—South Carolina. 452 
38. HESPEROMYS, Waterb. 453 
23. —Hesperomys campestris, Lee.—New Jersey. (Uncertain). 485 
41. ARVICOLA, Lac. 509 
24. —Arvicola albo-rufescens, Emmons.—Massachusetts. 549 
25. —Arvicola borealis, Rich.—Great Bear Lake. 549 
26. —Arvicola dekayi, Aud. &. Bach.—New York. 549 
27. —Arvicola drummondii, Aud. & Bach.—British Rocky Mountains. 550 
28. —Arvicola hirsutus, Dekay.—New York.. .. 550 
29. —Arvicola nasuta, Aud. & Bach.—Massachusetts. 550 
30. —Arvicola oneida, Dekay.—New York. 551 
31. —Arvicola richardsonii, Dekay.—British Rocky Mountains. 551 
32. —Arvicola rubricatus. Rich.—Behring’s Straits. 551 
33. —Arvicola texiana, Aud. & Bach.—Texas. 552 
34. —Arvicola xanthognathus, Leach.—Hudson’s Bay. 552 
Note.—O f the above Jlrvicolae, those most likely to prove additional species are Nos. 25, 27, 31, 32, and 34. 
45. LEPUS. Lin. 573 
35. —Lepus texianus, Aud. & Bach.—Texas Rabbit.—Texas and Arkansas. 617 
36. —Lepus nuttalii, Bach.—Least Hare.—Columbia River. (Very doubtful). 617 
