MURID^E. CLXXXV. 32 1 



ern regions. Var. gapperi Vigors, a little darker, with longer feet 

 and tail, ranges S. to Mass.; the typical form circuinpolar. (Eu.) 

 (Lat., red-haired.) 



546. OCHETODON Coues. (o^eroy, channel ; o8d>i>, tooth.) 



1045. O. humilis (Audubon & Bachman.) HARVEST 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. (/caXds, beautiful; /uCs, 

 mouse.) 



a. Tail very long, scant-haired, about as long as head and body; ears rather 

 small, closely hairy. (Oryzomys Baird.) 



1046. C. palustria (Harlan). RICE-FIELD 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. 



CM. Tail rather long, closely hair}', about as long as head and body; ears 

 large, rounded, scant-haired; feet and under parts white. (Musculus 

 Rafinesque.) 



1047. C. michiganensis (Audubon & Bachman.) Yellowish 

 brown, a sooty dorsal band ; belly white ; feet not quite white ; 

 tail bicolor; hind feet less than | inch. L. 4. T. 1^. Mich, to 

 111. and Kan. 



1048. C. aureolus (Audubon & Bachman.) RED MOUSE. Golden 

 cinnamon, especially bright on ears ; belly not pure white ; tail 

 unicolor. L. 6. T. 2. Pa. to 111. and S. (Lat., golden.) 



1049. C. americanus (Kerr). COMMON WHITE-FOOTED MOUSE. 

 DORMOUSE. Yellowish brown, grayish or fawn color; belly and 

 feet pure white ; tail distinctly bicolor; hind feet more than | inch. 

 L. 6. T. 3^. 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. 1^. Minn, to Kas. and 

 Montana. (Aeu/coV, white ; yaarrjp, belly.) 



548. NEOTOMAi Say & Ord. (vtos, new; ropos, cutting, 

 t. e., rodent). 



1051. N. floridana Say & Ord. WOOD RAT. Brownish gray ; 

 the sides tawny ; belly and feet all white ; tail scantily hairy. L. 

 13. T. 5. S. N. Y. to Col., Ariz., and S. 



1 Allied to Neotoma is the familiar Old World genus : 



Mus Linnaeus. (MV?. 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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