40 Recognition characters of some oj the cotmnoner 



Single distinctive characti : 



1. Forms in which tlic immature stages (commonly known as nymphs 

 and are plainly visible upon the back. 



Common Name 



Stone-flies 



May-flies 

 Damsel- flies 



Dragon-flies 



Water-bugs 



2. Forms in which the immature stages differ very greatly from the adults 

 internally and not visible from the outside, and having the legs shorter, rudi- 



3. Further characters of some common dipterous larvae. These are distin- 



CoMMON Name 



Crane-flies 



Net-veined midges 



Mosquitoes 



Black-flies 



True midges 



Soldier-flies 

 Horse-flies 



Snipe-flies 



Syrphus- flies 



Muacid flies 



Family 



TiptUidae 



Blepharoceridae 



Culicidae 



Simuliidae 



Chironomidae 



Stratiomyiidae 

 Tabanidac 



Leptidae 



Syrphidae 



Muscoidea 



Head 



Tail 



