EXPLANATION OF PLATE VI. 



Mouth-parts of the female of Pangonia longirostris. 



Fig. 1. Apex of the left labellum seen from the inner side. X 180. 



2. Left mandible. X 22. 



3. Left maxilla : c, cardo ; g, galea ; p, palp ; st, stipes. X 22. 



4. Hypopharynx. x 22. 



5. Labmm-epipharynx. X 22. 



