34 EVERMANN AND CLARK 



they sometimes do to lawns by their burrows. This, however, is 

 infinitesimal in comparison with the great good done by ridding the 

 fields, gardens and lawns of noxious worms, insects and larvae. 



31. Myotis lucifugus ( (Le Conte). 

 Little Brown Bat. 



The Little Brown Bat is quite common about the lake. They 

 first appear early in April and remain out at least until November. 

 We have definite records of April 10, June 23, September 17, Octo- 

 ber 9, and November i. 



On still evenings from May to October, just as the twilight deep- 

 ens and objects at a distance become indistinct, these little crea- 

 tures come out from their hiding places and may be seen circling 

 in and out among the cottages and trees, and now and then out over 

 the lake in their search for food. Rarely are they seen before sun- 

 down, but on moonlit nights we have seen them out over the lake 

 as late as eleven o'clock. 



