INTKOBUCTIOK. 



Palpifer. _ 

 PedurcU of Submentum. -V-- - 



OcctpiiaZ xrca.. -_. _ 



Fig. 2. — Head and mouth-parts of Pissodc.'? (Hylobiinas) ; A, ventral aspect 

 of apex of rostrum ; B, ventral aspect of entire head ; C. interno-lateral 

 aspect of maxilla ; D, externo-lateral aspect of maxilla ; a, apical tooth ; 

 /*, subapieal tooth ; c, inner lobe of gena ; d, gena ; e, mandibular socket ; 

 f, gena; c/, lacinial bristles ; k, fovea; on submentum. (After Hopkins.) 



