Male. Upperside. "The forewing is narrower than in S. Paradiseus, Staudinger, its distal margin nearly straight; the anterior green streak is narrower, the posterior one wider, entering the cell and distally running up to the anterior one. On the underside the forewing has a broad black band, beginning at the costal margin before the middle of the cell, running to upper angle of cell and thence to the disc, being distally limited by veins R1 and R3 ; the yellowish green scaling between these veins reduced to two small submarginal spots ; the yellowish streaks between the subcostal also reduced, the apex of the wing being black, with an ill-defined green streak of dispersed scales between SC3 and SC4 and a few more green scales behind SC4. "The hind wing of Meridionalis is more reduced in size than that of Paradiseus, narrower, the distal margin is gently concave, the tail is shorter, not gradually narrowing to the tip, but dilated before the apex, the anal angle is not produced ; the fringe of hairs upon the abdominal fold is much longer and not so dense. In neuration, the cell is much narrower in Meridionalis, R3 and M1 come from the cell, while in Paradiseus they are stalked together. The pattern of the wing is also very peculiar. The black distal border of Paradiseus is in Meridionalis indicated only at the extreme edge of the wing; veins all yellowish-green, a narrow outer border to wing and a broader streak from near base to tail in front of submedian fold also yellowish-green ; abdominal area up to submedian fold black, with a yellowish-green streak at basal edge, and another, more distal, streak of dispersed scales gradually disappearing distally ; the golden yellow area divided by the green veins ; cell all golden yellow."Femora as in female not striated with yellow, tibia broader than in Paradiseus" "Female. The markings on the disc of both wings purer white, being less dusted over with black scales than in Paradiseus Paradiseus. The patch in the cell of forewing is nearly straight at the basal side, its basal edge being very feebly dentate, while at the apical side it bears one deep triangular notch. There are three discal patches.The light area of the hind wing is much extended, the apex of the cell bearing a large white patch which is obliquely cut off. The portion of the light area outside the diseal black spots is brighter yellow than in Paradiseus, and so is the upperside of the abdomen.