CLASSIFICATION OF DIPTERA. 15 



Here the order Diptera is divided into two great sections ; one 

 the Ortliorrhapha and the other CydorrhapJia. 



The Pulicidct will be seen to be included in the Neiiiatocera, and 

 several other small differences from former methods of systematic 

 arrangement. 



I. Orthorrhapha. 



A. Nematocera. 



