Tertiaries of Radoboj, Croatia. Fore wing, Hof-Mineralien Kabinet, Vienna. Hind wing, Museum of Gratz, Austria. COLIATES SCUDDER. The fore wing (Pl. II, fig. 5) is slightly more than twice as long as broad; the costal border is straight for fully two-thirds its length, and then curves gradually and slightly downward, the apex rounded off; the outer margin has a nearly regular and slight convexity, but is nearly straight in the middle half; the lower outer angle is rounded and the inner margin slightly convex. The costal nervure scarcely reaches the middle of the costal border; the discoidal cell is but little more than half the length of the wing; the subcostal nervure has but two superior branches, although the outer is not only itself forked, but its upper fork is branched at the extreme tip of the wing; the first superior nervule is emitted at some distance previous to the tip of the cell, or opposite the base of the first median nervure; it terminates in the middle of the outer half, of the costal margin, and the forked branch of the outer superior nervule supports the extreme apex of the wing; the inferior subcostal nervule arises midway between the bases of the two superior nervules, and terminates about one-third way down the outer border; the vein closing the cell strikes it near the base and has an inward convexity, meeting the upper median nervule farther from its origin; the first median nervule originates at some distance beyond the middle of the cell. In the form of the wing and its neuration this fossil group is more nearly allied to Delias (Pl. II, fig. 4) than to any other genus I have been able to examine. It is plain at first glance that it must be placed in the vicinity of Delias, Thyca, Prioneris and similar East Indian Fugacia, in which there are but two superior subcostal nervules, and in which the outer of these is forked; but I have met with no instance among these in which one of these forks is itself branched; and this insect differs notably from them all in the elongate form of the wing, the remarkably straight costa[AD] and the shorter discoidal cell; and from all Pierids in the shortness of its costal nervure and the basal extension of the first superior subcostal nervule; this latter nervure always originates, in every living type I have examined, at or beyond a point opposite the middle of the space between the bases of the first and second median nervules. COLIATES PROSERPINA SCUDDER. Plate II, fig. 5.