MURIDA. — CLXXXV. 323 
549. PEROMYSCUS Gloger. (ipa, pouch; picxos, little 
mouse.) 
1055. P. michiganensis (Audubon & Bachman). Yellowish 
brown, a sooty dorsal band; belly white; feet not quite white; 
tail bicolor; hind feet less than $ inch. L. 44. T. 1}. Mich. to 
Dak. and Kan. + 
1056. P. nuttalli (Harlan). GotpEN Mouse. Golden cinna- 
mon, especially bright on ears; belly not pure white ; tail unicolor. 
L.6. T.2z. Va.and8. (To Thomas Nuttall.) 
1057. P. leucopus (Rafinesque). Common WHITE-FOOTED 
Mousse. Derr Movss. Yellowish brown, grayish or fawn color; 
belly and feet pure white; tail distinctly bicolor; hind feet more 
than 3 inch. The northern form has been called subspec. 
noveboracensis (Fischer), but the need of separation is question- 
able. L. 64. T. 33. Abundant everywhere in open fields; 
variable. (Aevkds, white; aovs, foot.) 
1058. P. canadensis (Miller). Larger than P. leucopus, longer, 
more hairy tail, which is always bicolor; young gray. L. 8. T. 4. 
Graylock, Mass., to Adirondacks and N. In dense woods. 
Subspec. umbrinus Miller. Smaller, yellower, with much dark 
shading, especially on back and face. L. 7. T. 33. Lake Ontario 
to Lake Huron. (Zat., shady.) 
Subspec. abietorum Bangs is recorded from fir forests of Nova 
Scotia. (Abies, fir.) 
1059. P. gossypinus (Le Conte). Corron Movuss. Larger 
than P. leucopus. L. 6}. T. 24. Rusty brown, with a dorsal wash. 
ashy white below; tail not paler. Cotton fields, S. probably N. to 
Va. (gossypium, cotton.) 
550. ONYCHOMYS Baird. (éwé, claw; pis, mouse.) 
1060. O. leucogaster (Maximilian). Mouse color, snow white 
below; ears high, furred. L. 54. T. 14. Minn. to Kas. and 
Montana. (Aevxos, white; yaorip, belly.) 
551. NEOTOMA! Say & Ord. (véos, new; ropés, cutting, 
i. e. rodent.) 
1061. N.pennsylvanica Stone. Woop Rar. Brownish gray; 
the sides tawny ; belly and feet all white; tail scantily hairy. L. 13. 
T. 5. Hudson highlands to Va. Rare and local. 
1 Representative of the sub-family of Murine is the Old World genus: 
Mus Linneus. (Hs, mouse.) 
M. decumanus Pallas. Brown rat. Wharf Rat. Tail nearly an inch shorter 
than head and body ; grayish brown above ; paler below; feet dusky white; 
fur mixed with stiff hairs; cosmopolitan ; introduced into America about 1775, 
