428 



THE INVERTEBRATA 



Fig. 3 17. A, Tryphaenapronuba, with venation and frenulum (fr.) ; cJ condition 

 on right. Original. B, Ohtect pupa oi Platyhedra gossypiella. After Metcalf 

 and Flint. 



Fig. 318. Head and proboscis of a moth. A, Front view. B, Side view. 

 After Metcalf and Flint. C, Transverse section of proboscis. After Eltring- 

 ham. dp. clypeus; d?n. diagonal muscles; e. eye; ep. epipharynx ; j§'rt'/. galea; 

 Ibr. labrum; l.h. locking hooks ; Ip. labial palp; wc/. mandible ; mxp. maxillary 

 palp; n. nerve; tra. trachea. 



