PART IL 

 Checks and Remedies. 



CHAPTER I. 

 NATURAL ENEMIES. 



All the insects, as well as other animals, have their natural 

 enemies, and mosquitoes are no exceptions to the rule. The 

 adults are taken by spiders, by numerous predatory insects, by 

 frogs, toads, lizards, bats and birds. Few of these are specifi- 

 cally mosquito destroyers, but are insect-eaters in general and 

 devour mosquitoes as they do everything that comes in their 



Figure 18. 



The transformation of a dragon fly: i, larva with its jaws extended; 2. pupa skin 

 from which adult has issued; 3, active pupa feeding; 4, pupa on stalk ready to transform; 

 5, adult dragon fly. 



way, the bulk of a meal being made up of whatever is present in 

 greatest abundance and most easily obtained. 



Those birds and other animals that are active only during the 

 day, retiring to roost as the sun sinks below the horizon, are of 

 comparatively little use. They may and do pick up odd speci- 

 mens here and there and some, where mosquitoes are plenty, 



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