96 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[338 



EXPLANATION OF PLATE V 



HEAD AND MOUTH-PARTS 



18. Ceramicc ptcta, last instar, cephalic aspect of head. 



19. Cirphis unipuncta, last instar, cephalic aspect of right antenna. 



20. C'rph'.s unipuncta, last instar, distal end of antenna. 



21. C-'rphis uniptmcUi, last instar, diagram of distal end of antenna. 



22. Cirphis unipuncta, last instar, lateral aspect of right mandible. 



23. Cirph-s unipuncta, last instar, mesal aspect of right antenna. • 



24. Cirphis unipuncta, last instar, caudal aspect of labium and maxillae. 

 24a. Cirphis unipuncta, last instar, distal end of maxilla, caudal aspect. 



25. Cirphis unipuncta, last instar, h>'popharynx and cephalic aspect of labium and maxillae. 



26. Cirphis unipuncta, last instar, distal portion of labium, caudal aspect. 



27. Cirphis unipuncta, last instar, distal portion of labium, cephalic aspect. 



ml-2 mandibular setae 



