FL. CX1V 



The dark female form 

 reveals its relationship to 

 the paler form by the 

 stripes on the under side. 

 On the upper side the in- 

 sect shown on Plate CXV 

 is very black and shows no 

 stripes at all. I possess 

 females with yellow wings 

 on one side and black on 

 the other. The identity 

 of the forms named by 

 Linnaeus turnus and g Cau- 

 cus could not be more 

 forcibly shown than by 

 these specimens in which 

 the two are united by the 

 vital force which called 

 them into being. 



189 



PL. CXV 



