Plate 5 



All the figures represent Euphydryas phaeton schausi from Cabin John, 



Maryland 



Fig. 33. Female which for four days in the early stages of pupation was exposed 

 to a temperature of 40°. 



34. Female which for four days in the early stages of pupation was exposed 



to a temperature of 80°. 



35. Female treated as that shown in Figure 34. 



36. Female treated as that shown in Figure 33. 



37. Female with an unusual development of white sjwts in the normally 



black area; June 11, 1926. 



38. Female treated as that shown in Figure 34. 



39. Female treated as that shown in Figure 34. 



40. Female with the fore wings unusually short (see also figs. 9 and 10, pi. 



2); June 11, 1920. 

 22 



O 



