NATURAL ENEMIES 99 



gnawing a hole through the wooden base, coming from 

 below. For weeks he has pursued his fly-hunting busi- 

 ness undisturbed. 



"On Sunday one of the waiters discovered him in 

 the act of introducing a friend or member of his family 

 to his foraging ground. The newcomer was very shy, 

 and only put his head through, while the old habitue 

 tried to coax him in the window. He would catch a 

 fly, gravely hand it to his friend, who would as gravely 

 eat it, and look for more. By degrees he lost a little 

 of his fear, walked out, and soon became an expert in 

 the new business. Either one or both may be seen al- 

 most any day by any one who may be patient enough to 

 wait for their appearance a short time. It is certainly 

 a very novel sight, and well worth a few minutes' time 

 to see. Neivburgh Telegraph." 



Mr. Nat. C. Dearborn, of the Biological Survey of 

 the U. S. Department of Agriculture, states that he has 

 frequently seen evidence of the destruction of adult 

 flies by mice on window-sills, the work having been 

 done at night. 



