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The Sovereigns (Differ from other nymphs)

The sovereigns differ from other nymphs in having the club of the antennæ marked with four slightly elevated lines, and in that the first three veins of the hind wings separate at the same point (Fig. 30). In the other nymphs the humeral vein arises beyond this point. The club of the antennæ is very long, and increases in size so gradually that it is difficult to determine where it begins. In its thickest part it is hardly more than twice as broad as the stalk. The palpi are slender, and the wings are rounded.

The larvæ present a very grotesque appearance, being very irregular in form, and strongly mottled or spotted with color.

Only a single genus is represented in the eastern United States. The species can be separated as follows:

A. Ground color of wings black.

B. Wings with a transverse white bow.

C. White bow of wings broad and extending across both wings. (B. arthemis), p. 167.