KiO 



PERIDROMIA ARETHUSA. 



PLATE XYIII. Fig. I, Fern. 



This genus has lately been proposed for the recep- 

 tion of a few species formerly classed among the 

 Nymphales. They are re- 

 markable for haying the 

 surface covered with blue 

 markings on a dark 

 ground, and in other re- 

 spects seem to be entitled 

 to generic distinction. 

 The neuration of the 

 wings presents the an- 

 nexed arrangement. — 

 The caterpillar (at least 

 of P. Amphinome) bears 

 some resemblance to that 

 of Morpho. It is long 

 and attenuated behind, 

 the anal extremity deeply 

 forked, and the head armed with eight strong 

 unequal spines, resembling a kind of coronet. The 

 chrysalis is elongated, bifid anteriorly, and having a 

 series of dorsal spines. They are natives of the New 



