CONCLUSIONS. 95 



be passed prohibiting the killing of all insectivorous birds, 

 under a heavy penalty, unless a person lias obtained and 

 paid for a license, to be not less than twenty-five dollars 

 per annum, the fees to be used toward the compensation 

 of game constables, and such license to be granted only 

 after approval by a competent board of officials. 



V. Conclusions. 



1. An attempt to destroy flies and mosquitoes by the 

 artificial propagation of di'agon flies or any other insect, 

 would be unprofitable, unadvisable, and impracticable. 



2. That if such attempt were both practicable in opera- 

 tion and profitable as to numbers produced, it would still 

 be unadvisable from a sanitary point of view (the anni- 

 hilation of every house fly would breed a pestilence). 



8. That if the natural conditions under which dragon 

 flies are produced could be totally eliminated, mosquitoes 

 would be greatly diminished. 



4. That a proper enforcement and observation of sani- 

 tary laws, and the passage of a jiroper law fi)r tlie pro- 

 tection of birds, afford the best solution of the question. 



