1. Neotoma magister, Baird, M. N. A. 1857, 498, in text. Loc. of remains :— Caves 

 in Pennsylvania, near Harrisburg and Carlisle. 



2. Neotoma floridana, Say and Ord. 



Syn. 3Ius floridana, Ord, Bull. Soc. Plulom. Phila. 1818, 181. 

 Arvicola floridana, Harlan, Fn. Anier. 1835, 141. 

 Neotoma floridana. Say and Ord, J. A. N. S. P. iv. 1825, 353, pi. x. 



figs. 1, 3, 3, 4. 

 Lemmus floridanus, Fischer, Syn. 1839, 399. 

 Neotoma mexieana, Bd., P. A. N. S. P. vii. 1855, 333 ; M. N. A. 1857, 



490 ; Mex. B. Snrv. ii. 1859, 44, pi. 24, f. 1 a-g. 

 Neotoma micropm, Bd., P. A. N. S. P. vii. 1855, 333 ; M. N. A. 1857, 

 493 ; Mex. B. Surv. ii. 1859, 44. 

 Eah. Southern United States, and Northern Mexico. North to 

 Maryland {Audubon),^ev^ York (iJe/O? and Massachusetts (Cr«7;6s). 

 Illinois, Arkansas, Kansas. 



3. Neotoma fuscipes, Cooper. 



Stn. Neotoma fuacipes. Cooper's MSS., Bd., M. N. A. 1857, 495. 



Hab. California. 

 [3 bis. Extralimital : Neotoma ferruginea, Tomes.] 

 Syn. Neotoma ferruginea, Tomes, P. Z. S. 1861, 281. 



Hah. Guatemala. Tehuantepec (Sumichrast). 



4. Neotoma cinerea, (Ord) Baird. 



Syn. Mas cinereus, Ord, Guthrie's Geog., 2d Am. ed., ii. 1815, 393 (based 

 on ash-colored rat toitJi hairy tail of the Rocky Mts., Lewis and Clarke, 

 passim). 

 Neotoma cinerea, Bd., M. N. A. 1857, 499, pi. liii. f. 4. 

 Myoxus drummondii, Rich., Zool. Journ. iii. 1838, 517. 

 Neotoma drummondii, Rich., F. B. A. i. 1839, 137, pi. viii. 

 Neotoma occidentalis, Cooper's MSS., Bd., P. A. N. S. P. vii. 1855, 

 335 ; M. N. A. 1857, 496, pi. liii. f. 3. 

 Hob. Western and Northwestern North America, to the Pacific. 

 East to Nebraska, Colorado, etc., and in British America to Hud 

 son's Bay. South to New Mexico and California. 



Genus III. SIGMODON, Say and Ord. 



Syn. Sigmodon, Say and Ord, J. A. N. S. P. iv. 1835, 353. Arvicola, 

 sp., Aud. and Bach., Harlan, Godman. — Hesperomys (subg. Beil- 

 emys), De Saussure, R. & M. Z. 1860 (type toltecus). 



Obs. Very closely related to the average sigmodon t mice. 

 Larger than usual; pelage hispid; soles naked, granular; hind 



