Systematic Position of the Genus Mycetobia, M</. 1 1 1 



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

 the exterior. 



Ldhimn (fig. 2). — Tlie homologies of the different parts of 

 the labium are still very uncertain. The structures usually 



Fii-. 



Fi- ?,. 



Fig. 2. — Maxilla and labiimi of {a) Rhyphus fenestrulis, Scop., {h) Olbio- 

 ynster afn'canus, Edw., and (c) Mycetubia pallipes, ^Ig. 



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

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

 the large hairy guhir plate. 



known as labella in Dipteru are regarded by Kellogg and 

 others as being j>araglossse, by Frey as representing tiie 

 labial palpi. 'ilie piece to which they are attached is 



