278 Illinois State Laboratory of Natural History^ 



EXPLANATION OF FIGURES. 



Plate I. 



1. Paraponyx ohscuralis, larva, dorsal view. 



2. Larval and pupal case. 



3. Posterior false leg of larva. 



4. Gill filament of larva. 



5. Abdominal segment of larva, showing bases of fila- 



ments and set £6 of piliferous tubercles. 



6. !Pupa, side view. 



Plate II. 



7. Paraponyx ohscuralis^ posterior extremity of pupa^ 



ventral view. 



8. Hydrocampa ohliteralis^ eggs on leaf, natural size. 



9. A few eggs enlarged. 



10. Larva, dorsal view. 



11. Larva in case, posterior extremity visible. 



12. Posterior false leg of larva. 



Plate III. 



13. Cr&raastus hartii Ashm., n. s. 



Plate IV. 



14. Clinocentras niger Ashm., n. s. 



Plate V. 



15. Bittacomorpha clavipes, larva, side view. 



16. Head of larva; right side, dorsal view; left side, 



ventral view. 



17. False foot of larva. 



18. Thorax of pupa, just before casting larval skin, 



cut beneath at middle and spread out, showing, 

 growth of respiratory tubes. 



