BRAUER'S CLASSIFICATION OF DIPTERA 



(t A cross denotes that the family is illustrated in this book. * An asterisk 

 intimates they will be found in the preceding volume.) 



Sub-order i. ORTHORRHAPHA 



Larva with a distinct head. Pupa obtected. 



The adult escapes from the pupal skin by a straight dorsal slit 

 which may be transverse but is more usually longitudinal. Imago 

 lacks the frontal lunule and ptilinum. 



Sub-order 2. CYCLORRHAPHA 



Larva without any distinct head. The Pupa coarctate. 



The adult escapes from the puparium through a more or less 

 round opening at the anterior end. Frontal lunule present ; ptilinum 

 usually present. 



Sub-order i. ORTHORRHAPHA 

 Section I. NEMATOCERA 



Antennae long and thread-like, composed of many similar or very 

 similar segments. The maxillary palpi usually elongate and flexible 

 of from 2 to 5 segments. Second long vein often forked. 



Section II. BRACK YCERA 



Antennae usually of three segments, the third usually elongated 

 and sometimes composed of a number of indistinct sub-segments and 

 often bearing a style or arista. Maxillary palpi of i to 2 segments, 

 not flexible. Second long vein not forked. Squamae completely con- 

 cealing the halteres. 



