NO. 1537. NOTES ON MAMMALS OF INDIANA— HAHN. 459 



sassafras bush, and an examination sliowed that its stomach was 

 gorged with sassafras leaves. So far as I know it is not a usual habit 

 for these animals to obtain their food from trees. 



SCIUROPTERUS VOLANS (Linnaeusj. 

 FLYING SaUIRREL. 



The flying squirrel is known to occur in the Kankakee Valley, 

 although I did not ol)tain any specimens. 



MUS MUSCULUS Linnaeus. 

 HOUSE MOUSE, 



Lives in the lields as \\('ll as in bulldjjigs. 



MUS NORVEGICUS Erxleben. 

 HOUSE RAT. 



Abundant about houses and farm buildings. 



PEROMYSCUS LEUCOPUS NOVEBORACENSIS (Fischer). 

 WHITE-FOOTED MOUSE. 



This species is abundant everywhere, being fountl in small mnnbers 

 at places in the swamps where all the land within the radius of 1 mile 

 is submerged for weeks at a time. I do not know how it exists at 

 such times unless it lives on the supplies which squirrels have stored 

 away in the trees. No doubt many individuals perish in the floods. 

 In these wooded swamps the white-footed mouse is not as exclusively 

 nocturnal as it is supposed to be elsewhere. 



PEROMYSCUS MICHIGANENSIS (Audubon and Bachman). 

 MICHIGAN WHITE-FOOTED MOUSE. 



I took this species only at Mountayr, where it was found in the 

 bluegrass by the roadside and in the dryer pastures. I have never 

 known the species to live in either swamps or woods. 



MICROTUS PENNSYLVANICUS (Ord). 

 MEADOW MOUSE. 



Like the white-footed mouse, this species is found in places which 

 are submerged during the winter and spring months. Since it does 

 not climb trees nor live in the woods I am unable to see how it escapes 

 drowning. I did not find it in places remote from higher ground, as 

 was the case with the former species, but at one place where a low 

 hill covered with bluegrass was bordered by a marsh overgrown with 

 coarse, high marsh grass, I trapped both on the hill and in the marsh 

 for several days. On the hill I did not get a single meadow mouse, 

 while in the marsh I got five and saw many runways. It is possible 

 that they retreat to the hill in times of flood, and then, finding the 

 marsh grass better suited to their taste, go back to it in the summer. 



