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

 ively ; mature larva. 



