KKY TO INDIANA MAMMALS. 



445 



NN. Color brownish or grayish; mo- 

 lars rooted. (('ommon 

 meadow mice.) 



Genus Mkrotus, p. 505 

 MM. Legs and ears of moderate length; 

 tail more than liaH' as long as 

 head and body; crowns of mo- 

 lars with tubercles. 

 N. Molars with tubercles in two 

 rows (these may be worn off 

 in old animals). (House mice 

 and house and wharf rats.) 



Genus Mus, p. 491 

 NN. Tubercles of molars in three 

 rows; native mice of the 

 fields and woods. 

 O. Size and proportions about 

 as in the house mouse; 

 belly pure white; eyes and 

 ears large. (White-footed 

 mice; common.) 

 Genus Peromyscus, p. 495 

 00. Size larger; species of doubt- 

 ful occurrence or intro- 

 duced into the state. 

 P. Color of back bright 

 reddish; belly white; 

 introduced species 

 from the tropics. 

 Genus Nyctormjs, p. 503 

 PP. Found in caves and 

 rocky cliffs; belly pure 

 white; about the size 

 of a house rat. 

 Genus Neotoma, Appendix, p. 641 

 PPP. Found about water; 



smaller; belly grayish. 

 Genus Oryzomys, Appendix, p. 640 

 DT). Tooth row continuous from incisors to last molar, front teeth 

 not chisel-shaped. (In the moles the upper front teeth are 

 always large and somewhat chisel-shaped, but the characters 

 given under the family easilj'' distinguish them.) 

 E. Size small (total length under ten inches); eyes very small; 

 snout pointed. (Moles and shrews, generally with burrow- 

 ing habits.) Order INSECTIVORA, p. 597 

 F. Fore feet very broad and fiat; length of adults always over 

 five inches. (Moles.) Family Talpidae, p. 608 

 G. A star of fleshy projections around the nose; teeth, 

 . I, f ; C, i; Pm, f; M, |. 



Genus Condylura, p. 613 

 GG. No fleshy star about nose; teeth not as above. 



