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The Whites (AA Vein M of the front wings)

AA. Vein M2 of the front wings arising from the cross-vein at the end of cell R+ M, the apex of this cell not cut off obliquely by it (Fig. 28); radius of front wings distinctly four- or five-branched (except in Nathalis, in which it is only three-branched, but in this genus vein M2 clearly arises from the cross-vein, arising nearly midway between veins M₁ and M3).

B. Lower side of hind wings marked with a greenish net work. Prevailing colors white, p. 81.