I, 



DIPTERA. 



DIPTEEA. 



lying flat in cavities at the sides of the head ..1. SUCTORIDEA. 



. . 2. PROBOSCIDEA. 

 . 3. EPROBOSCIDEA. 



seated in front of f^ose side by side 

 Lthehead: Legs 



SUCTOEIDEA. 

 Suctoria, Degeer; Latr. 



Aphaniptera, Kirby ; Stephens ; Curtis ; Westwood. 

 Siphonaptera, Latr. 

 Aptera, Lamarck ; M'Leay. 

 Aptera p., Linn. ; Dumeril. 

 Ehophoteira p., Clairville. 



Diptera p., Oken; Burmeister; Erichson; Siebold. 

 Eyngota p., Fabr. 

 AntHata p., Schioedte. 



Antennae pone oculos, laterales, distantes, recumbentes. 

 Oculi bini, laterales, simplices. 

 Mandibulse extricatse, serratas. Lingua nulla. 

 Palpi labiales non semper obsoleti. 

 Alae et halteres nulla. 

 Epimera prothoracis libera, porrecta. 



Corpus compressum, ad juncturas thoracis cum capite et abdomine non 

 constrictum. 



PEOBOSCIDEA. 



Proboscidea, Latr. 

 Diptera, Leach ; Meigen. 



Antennae in fronte inter oculos. 



Labium apice bilobo. Lingua labro inclusa. 



Palpi maxillis affixi, vel fulcro proboscidis. 



Alse et halteres in plerisque. 



Pedes cujusque paris inter se fere contigui. 



Head attached to the front of the thorax by a slender neck. Large 

 compound facetted eyes at the sides of the head ; on the vertex often 

 three simple eyes. Antennae inserted in front of the head, between the 

 large eyes. Proboscis attached to a fleshy prop inserted in a cavity in 



