MURIDA. — CLXXXV. a2Zk 
ern regions. Var. gapperi Vigors, a little darker, with longer feet 
and tail, ranges S. to Mass.; the typical form circumpolar. (£w.) 
(Lat., red-haired.) 
546. OCHETODON Coues. (6xerds, channel; dda», tooth.) 
1045. O. humilis (Audubon & Bachman.) HaArvest Mouse. 
Mouse-color, the fur soft and silky; whitish below. L.4}. T. 2. 
Smallest of our mice. S.C. to Iowa, Utah and S. (Lat., humble.) 
547. CALOMYS Waterhouse (1837). (Hesperomys Water- 
house 1839). WHITE-FOOTED MICE. (kadds, beautiful; pis, 
mouse. ) 
a. Tail very long, scant-haired, about as long as head_and body; ears rather 
small, closely hairy. (Oryzomys Baird.) 
1046. C. palustris (Harlan). Ricre-rreLtp Mouse. Blackish 
and ashy above, becoming paler below; fur harsh, but compact ; 
soles perfectly naked; a large, rat-like species. L.8. T.4. N.J. 
to Kan. and S. 
aa. Tail rather long, closely hairy, about as long as head and body; ears 
large, rounded, scant-haired; feet and under parts white. (Jusculus 
Rafinesque.) 
1047. C. michiganensis (Audubon & Bachman.) Yellowish 
brown, a sooty dorsal band; belly white; feet not quite white ; 
tail bicolor; hind feet less than 3? inch. L. 4}. T. 14. Mich. to 
Ill. and Kan. 
1048. C. aureolus (Audubon & Bachman.) Rep Mouse. Golden 
cinnamon, especially bright on ears; belly not pure white; tail 
unicolor. L.6. T. 23. Pa. to Ill. and S. (Lat., golden.) 
1049. C. americanus (Kerr). Common WHITE-FOOTED Mouse. 
Dormovuse. Yellowish brown, grayish or fawn color; belly and 
feet pure white ; tail distinctly bicolor; hind feet more than 2 inch. 
L. 64. T. 34. N. Am.; abundant everywhere. (Hesperomys 
leucopus Raf.) 
aaa. Tail very short, closely hairy, not much longer than head. (Onychomys 
Baird.) 
1050. C. leucogaster (Maximilian). Mouse color, snow-white 
below; ears high, furred. L. 5}. T. 14. Minn. to Kas. and 
Montana. (Aevkds, white; yaornp, belly.) 
548. NEOTOMA! Say & Ord. (véos, new; ropds, cutting, 
i. @., rodent). 
1051. N. floridana Say & Ord. Woop Rat. Brownish gray ; 
the sides tawny ; belly and feet all white; tail scantily hairy. L. 
13. T.5. §.N. Y. to Col., Ariz., and S. 
1 Allied to Neotoma is the familiar Old World genus : 
Mus Linneus. (sds, 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 
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