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The Angle-Wings

With the exception of a single species, the buckeye, all of the angle-wings found in our Eastern fauna are sharply distinguished from other nymphs by having hairy eyes. The club of the antennæ is long and fairly distinct; it is marked with three slightly elevated lines. The wings are usually decidedly angular and excised; but in the last four species described below this character is not so prominent as in the others. A large proportion of the species hibernate in the adult state, and some of them are the first butterflies to appear in the spring. Some of the hibernating species, however, remain in concealment till quite late in the season. The species that occur in the eastern United States can be separated by the following table :

A. Without a silvery spot on the center of the lower surface of the hind wings. B. Eyes naked; upper surface of fore wings with one or two conspicuous eyelike spots. (J. cœnia), p. 160.