92 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[334 



EXPLANATION OF PLATE m 



CAUDAL ASPECT OF HEAD, TENTORIPM, POSTGENA 



8. Epargyreous tityrtis (Hcsperiidae), last instar, postgenal region, ectal aspect. 



9. Cirphis unipuncta, last instar, caudal aspect of head. 



10. Polia renigera, last instar, postrenal region, ectal aspect. 



11. Nephelodes emm.donia, last instar, postgenal region, ectal aspect. 



12. FeJlia suhgothica, last instar, postgenal region, ectal aspect. 



13. Cirphis unipuncta, last instar, cephalic aspect of head, ental surface. 



14. Cirphis unipuncta, last instar, caudal aspect of head, ental surface. 



vl-13 setae of vertex 



