PLATEi XL. 



Fig. 14. Compo.site view of head and mouth parts of Siiiiiiliiiiii vU- 

 tatnui. E, eyes; C. elypeus; MD, mandible; MX. maxilla; LA, labium; 

 uoo, muscular attachments of labrum and elypeus; LM. labium; HPY, 

 hypopharynx; oo, attachments of hypopharynx and labrum. 



Fig. 1.5. Lacina of maxilla, greatly enlarged, showing the barb-like 

 teeth turned backward on it. 



Fig. 16. End of labrum, showing the chitinized parts and the two 

 teeth. 



Fig. 17. Maxilla of S. rittiitntii. C. cardo; S, stipes; PF, palpifei-; 

 L, lacina; PA, palpus. 



Fig. 18. End of mandible, greatly enlarged to show the saw-like teeth 

 on its end. 



Fig. 19. Antennae of S. vittatum. 



Fig. 20. C, elypeus; M, mandibles. 



Fig. 22. Mandible. C, condyle (?) of mandible. 



Fig. 24. A' B', points of hypopharynx where A and B of the labrum 

 attach. 



