360 INTRODUCTION TO ZOOLOGY chap. 



Family 2. Syrphidae.^ 



Genera. Syrphus (Hover-fly). 

 Volucella. 



Eristalis (Drone-fly). 

 Family 3. Stratiomyidae.^ 



Genus. Stratiomys (the Chameleon-fly). 

 Sub-order 2. Nemocera. 



Family 1. Culicidae. Gnats. 



Genera. Culez (the Common Gnat or Mosquito). 

 Anopheles (the Spotted Gnat, the 



Malarial Mosquito). 

 Oorethra (the Phantom-fly). 

 Family 2. Chironomidae.^ Midges. 



Ghironomus (the Harlequin-fly). 

 Tanypus (the "Splay-footed fly"). 

 Ceratopngon (the Horn-bearing fly). 

 Family 3. Simuliidae.^ 



Siitmliwm (the River Sand - fly or 

 Buffalo-gnat). 

 Family 4. Tipulidae. 



Tipula (Daddy-long-legs or Crane- 

 fly)- 

 Family 5. Cecidomyidae.^ Gall-midges or Gall-gnats. 



Species. Gecidomyia taxi (the Yew Artichoke 

 Gall-midge). 

 Gecidomyia destructor (the Hessian-fly). 

 Gecidomyia ulmariae (the Meadow-sweet 

 Gall-midge). 

 Sub-order 3. Aphaniptera (sometimes separated as a distinct 

 order). 

 Family. Pulicidae. Fleas. 



Pulex irritans (the Common Flea). 



Practical Notes on Diptbea Nemocera 



1. Examine the contents of any rain-water tub during the 

 summer months ; probably several different kinds of dipterous 

 larvae can be obtained from it with the aid of a small muslin net. 

 Sort these out, transferring some of each kind to a separate tank 

 of clean rain-water, at the bottom of which a layer of mud and 

 decaying leaves has been allowed to settle. 



^ For identification of species of these families see 6. H. Verrall's 

 British Flies, vols. v. and viii. 



^ For detailed account of these families see Theobald's British Flies, vol. i. 



