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PERIDROMIA ARETHUSA.
PLATE XVIII. Fig. 1, Fem.
This genus has lately been proposed for the reception of a few species formerly classed among the Nymphales. They are remarkable for having the surface covered with blue markings on a dark ground, and in other respects seem to be entitled to generic distinction. The neuration of the wings presents the annexed 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
