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The Red-Barred Sulphur (Callidryas philea)

Callidryas philea (Cal-lid'ry-as phil'e-a) PLATE XVI, FIG. I This is the largest of all the yellows found in the eastern United States, the wings expanding from three inches to nearly four inches. The wings are bright yellow above with a large orange patch in the male crossing cell R + M of the front wings somewhat beyond the middle of the cell; and with the outer margin of the hind wings orange in both sexes. In the female there is a row of dark-brown spots along the outer third of the costa of the front wings and along the outer margin of both wings; and on the fore wings there is a submarginal row of nine spots in cells R₁ to Cu,. This is a tropical species that invades the United States in Texas, and occasionally flies northward to the Mississippi Valley.