INSECTA BRITANNICA. 



D I P T E R A. 



0* suctorium, proboscide, setis inclusis, palpisque. 

 Ala Una ; halteres bini pone alas. 

 Tarsi pentameri. 



Oken, 1821. Burmeister; Strauss Durckheim ; Erichson ; Siebold. 

 Antliata ; Schioedte, 1841. 



Diptera et Suctoria : Degeer, 1778 ; Latreille, 1797 ; Savigny ; Duges. 

 Diptera et Aptera : M'Leay, 1821. 

 Diptera et Siphonaptera : Latreille, 1825. 

 Diptera et ApJianiptera : Kirby, 1826; Westwood. 



Diptera, Omaloptera et Aptera-. Leach, 1819. 



Diptera, Pupipara et Suctoria: Latr., 1821. 



Diptera, Homaloptera et ApJianiptera : Stephens, 1827 ; Curtis. 



Diptera, Omaloptera et Pulicarii : Kondani, 1841. 



* The synonyms are arranged in the following gradations : 



2 . costive. 



" 



7 



3. Supplementary . An entire group and part of another co-ordinate . . 11-17 



4. Indefinite . . . Portions only of groups ... ...... 18, 19 



5. Ancient, before the distinct gradations of groups were observed . . . 20-22 

 VOL. I. B 



