LIST OF SPECIES. XLIII 
. Page. 
163.—Neotoma micropus, Baird, (n.s.)—Black Wood Rat.—Lower Rio Grande of 
ESM A TIE ANEGRUCRIS eats hy sas ctne aah ae tawny on Up vias hiyncu seh vacageangenabaaes 492 
164.—Neotoma fuscipes, Cooper, Mss., (n. s.)—Brown-Footed Rat.—Santa Clara to 
Poatallumay Caliadegtts Biadsasd ee hard ea aac ee sw TagOaeeabatsl Sov eesebacswanke 495 
165.—Neotoma occidentalis, Cooper, (n. s. Pero Rat.—Mouth of Columbia, 
and. Puget s: Sound cove cle additives intritelonet ii sowecieet ant ebeersaareasve ae 406 
166.—Neotoma cinerea.—Rocky Mountain Rat.—Eastern slope of northern Rocky 
Monmtamipe amd, mpper WUSSOUT,. ices casscassscapgsoenensenst ocswsrenscesse¥ssnne 499 
166.*—Neotoma magister, Baird, (n. s.)—Carlisle Bone Cave, Pemnsylvania. Fossil. 
40. SIGMODON, Say & Ord. 500 
167.—Sigmodon hispidus, Say & Ord.—Cotton Rat.—Southern Atlantic and Gulf 
2120 eS ee a SAE ANE Ts E,» eek er St eetiseddaaated weve. DOA 
168.—Sigmodon berlandieri, Baird, (n. s.)—Texas Cotton Rat.—Texas............s000 wwe =O 
41. ARVICOLA, Lacep. 509 
a. Hypudaeus, Keys. & Blas. 
169.—Arvicola gapperi, Vigors.—Red-Backed Mouse.—Nova Scotia, Massachusetts, 
Canada; and Hake, Superior. cocsitl. maipsnvel leven aCe a TR 518 
b. Hemiotomys, Selys. 
170.—Arvicola riparia, Ord.—Bank Mouse.—Northern and Middle States.............0000 522 
171.—Arvicola breweri, Baird, (n. s.)—Gray Mouse.—Muskeget Island, Mass.......... vat aes 
172.—Arvicola rufidorsum, Baird, (n.s.)—Holmes’ Hole, Mass. (Martha’s Vineyard.) 526 
173.—Arvicola townsendii, Bachman.— Washington & Oregon.........cssseccesseeeseeeeeees 527 
174.—Arvicola montana, Peale.—Cascade Mountains, Oregon & California; Western 
TCITAR IO nn sonnene Ciix tad aabletics aight vee <EunssiSuuesse ens tlesweasea leaves = 528 
175.—Arvicola longirostris, Baird, (n. s.)—Cascade Mountains, Oal............0008 snateeps 3a 530 
176,— Arvicola edax, Leconte.—Monterey to San Diego, Cal.......cc.cccsssseeeseesesseeeeeees 531 
177.—Arvicola californica, Peale.—California...........cccescscscececsceccsccuc souccsececcesnecce 532 
178.—Arvicola occidentalis, Peale.—Puget’s Sound BEE ect en over ive teamece ees iscnsehoavebateanies 534 
179.—Arvicola modesta, Baird, (n. s.)—Sawatch Pass, Rocky Mountains.............0000+ 535 
c. Chilotus, Baird. 516 
180.—Arvicola oregoni, Bachman.—Steilacoom, W. T., to Tomales Bay, Cal............ 537 
d, Pedomys, Baird. 517 
181.—Arvicola austera, Leconte.—Prairie Meadow Mouse.—Wisconsin to Louisiana... 539 
