AMERICAN ENTOMOLOGY. 33 



The lower right figure; the figure near the bottom of the 

 plate is a magnified representation of an antenna. 



ARGYNNIS. Plate XVII. 

 Papilio Linn. 



Generic character. Antennas terminated by a short club ; palpi 

 divaricating, second joint compressed, broad, hairy; third joint 

 terminating abruptly by a short, slender, acute joint : inferior wings 

 suborbicular ; anterior feet short, feeble: tarsi with double nails. 



Obs. Many species of this genus are beautifully decorated with 

 spots on the lower surface of the inferior wings, resplendent with 

 all the brilliancy of polished silver, or rivalling the milder, but 

 not less attractive lustre, of precious opal. The superior surface 

 of the wings is varied with red or orange, agreeably relieved by 

 spots or lines of black or brown. The larva or caterpillar is 

 armed with spines, and the pupa or chrysalis attaches itself by 

 the tail to a fixed object, in order to pass its destined period of 

 quiescent preparation, for its change to the perfect, adult or 

 butterfly state. 



Linne included the species in his genus Papilio, but Fabricius 

 separated them as a distinct group under the name we have here 

 adopted. 



Argynnis Diana Cramer. — Specific character. Wings above 

 black-brown, with a very broad fulvous exterior margin, in 

 which are a few blackish spots and nervures. 



Papilio Diana Cramer, Ins. vol. ii. p. 4. pi. 98, fig. P. E. 



Le P. Diane Encycl. Method. Insectes, pi. 35, f. 2. 



Desc. Body above black-brown : vertex, and anterior sides of 

 the thorax, ferruginous : wings on the basal two-thirds blackish- 

 brown : the outer third pale fulvous, on the superior wings 

 divided by blackish-brown margined nervures, and marked by 

 two distant series of dots of a similar color, the exterior of which 

 is obsolete ; on the margin of the inferior wings the two series 

 of dots are hardly to be traced : beneath, on the superior wings, 

 the blackish-brown basal portion has from six to eight ochraceous 

 spots, of which the external ones are longitudinal, and those 

 nearer the base are nearly transverse : intervening between these 

 two sets of spots, are two opalescent spots, placed transversly, 

 and sometimes confluent ; exterior third of the wing ochraceous, 



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