rior part of the body, and two on the posterior 

 part. The pupa is of a delicate green colour, 

 with dots of burnished gold. It feeds on different 

 species of Asclepias, and is very abundant in 

 the neighbourhood of Philadelphia, on the A. 

 syriaca, and according to Abbot in South 

 Carolina, on the A. curassavica. I consider 

 the present as the pkxippus, on the authority 

 of Gmelin, who, in his edition of the Systema 

 Naturae, states its native country to be North 

 America. I have of course omitted many 

 synonyms and references which that author 

 has inserted, as I consider them to be doubtful. 

 Catesby's figure cannot be mistaken ; he states 

 that the species is "common in most of the 

 northern colonies in America." 



The plate presents two views of the insect. 



PLATE 54. 



