CLASSIFICATION OF DIPTFRA. 



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Brachycera. 

 Metagnatha. 

 Rhyphidae. 

 Bibionidae. 



Bibioninse. 

 Bibionini. 

 Simuliini. 

 Orpbepbilinae. 

 Blepharocerinae. 

 Metarhyncha. 



Homoeodactyla. 

 Stratiomyidae. 



Xylopbaginae. 

 Stratiomyinae. 

 Leptidae. 



Leptinae. 

 Nemistrinse. 

 Tabanidae. 



Tabaninas. 

 Acrocerinae. 

 Heterodactyla. 

 Pleroneura. 

 Tberevidae. - 

 Therevinae. 

 Therevini. 

 Scenopinini. 

 Apioeerinae. 



I have given these more pretentious systems of classi- 

 fication of the diptera in order that the tyro in their study 

 may not reach the erroneous conclusion that any system 

 is authoritative. Frankly, I do not have a great deal of 

 faith in any of them. They are, in part at least, the bi- 

 ased personal opinions of their authors, their individual 

 views as to the importance of the different characters, 

 opinions which can only reach an approximate equilib- 

 rium after we have a much greater knowledge of ancient 

 types, and perhaps of the embryology of modern forms. 

 Upon the whole, Osten Sacken has brought a wealth of 

 7 



Bombylidae. 



Anthracinae. 



Bombylinae. 



Asilidae. 



Asilinae. 



Midinae (sic). 



Eremoneura. 



Ortborrhapha. 



Empididae. 



Enipidinae. 



Hybotinae. 



Dolichopodidae. 



Diaphorinae. 



Dolicbopodinae. 



Cyclorrbapba. 



Syrpharia. 



Platypezidae. 



Lonchopteridse. 



Phoridae. 



Pipunculidae. 



Syrpbidae. 



Myodaria. 



Conopidae. 



Muscidae. 



