66 DRAGON FLIES VS. MOSQUITOES. 



On page 58 will be found a resume of the present 

 knowledge of the subject of fungoid growths likely to 

 affect the fly. 



The application of oil can only be made during the 

 larval and pupal stages. Spraying petroleum on com- 

 post heaps and other breeding places will be effective. 

 The methods of applying are described on page 65. We 

 believe that, after much study and experience, the Odo- 

 nata cannot be considered a formidable enemy. The 

 method of breeding them, however, has been described 

 on page 62. 



A Final Summing Up. 



To gather together the weight of the testimony in the 

 foregoing chapters, and to clearly set before the reader 

 what, in our opinion, may be the best exterminators to 

 use against Culicidse and Muscidae in their various stages, 

 Mc close with the following table : — 



CuLiciDiE : Larva and pupa. 



1. Sprayed petroleum. 



2. Flushing, circulating, grading. 



3. Odonat culture. 



Imago. 



1. Pennyroyal vapors. 

 ^. Odonat culture. 



MusciD^ : Larva and pupa. 

 1. Sprayed petroleum. 



Imago. 



1. Cultivation of fungoids. 



2. Odonat culture. 



