systematic Position! of the Genus Mycetobia, Mc/. Ill 



where it is well developed) appear to possess any opening to 

 the exterior. 



Labium (fig. 2). — The homologies of tiie different parts of 

 the labium are still very unceitain. Tlie structures usually 



Yis. 2. 



Fif"-. 3. 



Fig. 2. — Maxilla and labium of (a) Bhyphus fcnestrdlis, Scop., {h) Olbio- 



gaster afn'camis, Edw., and (c) Mycetobia jJaHipes, Mg. 

 Fig. 3. — Under surface of head of (a) Hkyij/ius punctatus, Fabr., (i) 01- 



ijuer ounai;B ui ueau ui («) Rkyphus puiictatus, Fabr., {b) 01- 

 bioyaster africanus, Edw., (c) Mycetobia pallipes, Mg. Note 

 the large hairy gular plate. 



known as labella in Diptera are regarded by Kellogg and 

 others as being j)araglossa3, by Fiey as representing the 

 labial palpi. The piece to which they are attached is 



