16 
LIST OF SPECIES. 
Page. 
163. —^Neotoma micropus, Baird, (n. s.)—Black Wood Eat.—Lower Eio Grande of 
Texas and Mexico........... 492 
164. —Neotoma fuscipes, Cooper, Mss., (n. s.)—Brown-Footed Eat.—Santa Clara to 
Petaluma, Cal...... 496 
165. —Neotoma occidentalis, Cooper, (n. s.)—Hairy-Tailed Eat.—Mouth of Columbia, 
and Puget’s Sound.....•...... 496 
166. —Neotoma einerea.—Eocky Mountain Eat.—Eastern slope of northern Eocky 
Mountains, and upper Missouri.. 499 
166. *—Neotoma magister, Baird, (n. s.)—Carlisle Bone Cave, Pemnsylvania. Fossil. 
40. SIGMODOH, Say & Ord. 500 
167. —Sigmodon hispidus, Say & Ord.—Cotton Eat.—Southern Atlantic and Gulf 
States........ 602 
168. —Sigmodon herlandieri, Baird, (n. s.)—Texas Cotton Eat.—Texas.. 604 
41. AEVICOLA, Lacep. 509 
a. Hypudaeus, Keys. & Bias. 
169. —Arvicola gapperi, Vigors.—Eed-Backed Mouse.—-Nova Scotia, Massachusetts, 
Canada, and Lake Superior....... 618 
h. Hemiotomys, Selys. 
170. —^Arvicola riparia, Ord.—Bank Mouse.—Northern and Middle States... 622 
171. —^Arvicola breweri, Baird, (n. s.)—Gray Mouse.—Muskeget Island, Mass... 625 
172. —Arvicola mfidorsum, Baird, (n. s.)—Holmes’ Hole, Mass. (Martha’s Vineyard.) 626 
173. —Arvicola townsendii, Bachman.—Washington & Oregon............ 627 
174. —Arvicola montana, Peale.—Cascade Mountains, Oregon & California; Western 
Nebraska?. 628 
175. —Arvicola longirostris, Baird, (n. s.)—Cascade Mountains, Cal............ 530 
176. —Arvicola edax, Leconte.^—Monterey to San Diego, Cal... 631 
177. —Arvicola califorpoica, Peale.—California...... 632 
178. —Arvicola occidentalis, Peale.—Puget’s Sound. 534 
179. —Arvicola modesta, Baird, (n. s.)—Sawatch Pass, Eocky Mountains............. 635 
c. ChilotvSj Baird. 616 
180. —Arvicola oregoni, Bachman.—Steilacoom, W. T., to Tomales Bay, CaL.... 637 
d. Pedomys^ Baird. 617 
181. —Arvicola austera, Leconte.—Prairie Meadow Mouse.—Wisconsin to Louisiana ... 539 
