10 PEOCEEDINGS OF THE NATIONAL MUSEUM. voi, r,(i 



Plate 4. 

 Cosmopolites sonlidns (Germar). 



Fig. 1. Labrum. 



2. Head, dorsal view. 



3. Epipharynx. 



4. Thoracic spiracle. 



5. Full grown larva, lateral view. 



6. Mouth parts, ventral view. 



7. Mouth parts, dorsal view. 



Plate 5. 

 Metamas'nis sericeus (Latreiile). 



Fig. 1. Labrum. 



2. Head, dorsal view. 



3. Epipharynx. 



4. Thoracic spiracle. 



5. Full-groAATi larva, lateral view. 



6. Mouth parts, ventral view. 



7. Mouth parts, dorsal view. 



Plate 6. 

 Calendra callosa (Olivier). 



Fig. 1. Labrum. 



2. Head, dorsal view. 



3. Epiph;irynx. 



4. Thoracic spiracle. 



5. Full-grown larva, lateral view. 



6. Mouth parts, ventral view. 



7. Mouth parts, dorsal view. 



Plate 7. 

 RhijnchopJiorus crueutatus (Fabricius). 



Fig. 1. Labrum. 



2. Head, dorsal view. * 



3. Epipharynx. 



4. Thoracic spiracle. 



a. Opening. 



b. Longitudinal section of spiracle and trachea showing closing 



apparatus. 



c. Cross section showing closing apparatus of spiracle. 



5. Full-grown larva, lateral view. 



6. Mouth parts, ventral view. 



7. Mouth parts, dorsal view. 



