152 ILLINOIS BIOLOGICAL MONOGRAPHS [152 



EXPLANATION OF PLATE III 

 Setal Maps. 



Figs. 17, 18, 19, 20. Feltia gladiaria, Noctuidae. Prothorax, mesothorax, and first 

 and second abdominal segments respectively; first instar. 



Figs. 21, 22, 23, 24. Feltia gladiaria, Noctuidae. Same segments of the mature 

 larva. 



Figs. 25, 26, 27, ^28. Hyphantria cunea, Arctiidae. Same segments of the mature 

 larva. 



EXPLANATION OF PLATE IV 

 Setal Maps. 



Figs. 29, 30. Feltia gladiaria, Noctuidae. Abdominal segments 6 to 10 respect- 

 ively ; first instar. 



Figs. 31, 32. Feltia gladiaria, Noctuidae. Abdominal segments 6 to 10 respect- 

 ively; mature larva. 



Figs. Z2, 34- Hyphantria cunea, Arctiidae. Abdominal segments 6 to 10 respect- 

 ively; mature larva. 



