14 
LIST OF SPECIES. 
Page. 
130. —Dipodomys agilis, Gambel.—Fort Yuma and San Diego, Cal., to San Francisco... 414 
84. PEROGNATHUS, Maxim. 416 
a. Perognathus, Max. 417 
131. — Perognathus penicillatus, Woodhouse.—^Tuft-tailed Mouse.—San Francisco Moun¬ 
tains, New Mexico, to Fort Yuma, California, along Colorado.. 418 
132. — Perognathus fasciatus, Pr. Max.—Fort Union, Nebraska, and Fort Riley, Kansas 
Territory, to Chihuahua. 420 
133. —Perognathus hispidus, Baird, (n. s.)—Matamoras. 421 
134. — Perognathus monticola, Baird, (n.s.)—St. Mary’s, Rocky Mountains. 422 
h. Cricetodipus, Peale. 418 
135. —Perognathus flavus, Baird, (n. s.)—Upper Missouri, along eastern slopes of Rocky 
Mountains to Sonora and Chihuahua; and along the Rio Grande to 
Matamoras. 423 
136. — ^Perognathus parvus, Leconte.—King’s River, California. (Oregon, Peale.). 425 
35. JACULUS, Wagler. 429 
137. — Jaculus hudsonius. —Jumping Mouse.—Nova Scotia, (Labrador, Pennant,) to 
Southern Pennsylvania, and west to the Pacific Ocean. 430 
TRIBE MURES. 
36. MUS, Linnseus. 436 
138. — Mus decumanus, Pallas.—Brown Rat.—Throughout North America. (Introduced.) 438 
139. — Mus rattus, L.—Black Rat.—Throughout North America. (Introduced.).. 439 
140. — Mus tectorum, Savi.—White-Bellied Rat; Roof Rat.—Tar River North Carolina, 
to Georgia ; Northern Mexico. (Introduced.). 441 
141. — ^Mus musculus, Linn.—Common Mouse.—North America generally. (Introduced.) 443 
TRIBE SIGMODONTES. 445 
37. REITHRODON, Waterhouse. 447 
142. — Reithrodon humilis. —Harvest Mouse.—South Carolina and Georgia, to St. Louis? 448 
143. —Reithrodon montanus, Baird, (n.s.)—Rocky Mountains. Lat. 39°. 449 
144. —^Reithrodon megalotis, Baird, (n.s.)—Sonora. 451 
145. Reithrodon longicauda, Baird, (n. s.)—San Francisco and Petaluma, California.... 451 
