Of cisseis Bates writes that the butterflies present a magnificent spectacle as they sail along by twos or threes at a great height in the still air of a tropical morning.

But according to Dr. Hahnel cisseis only awakes when the high-flying perseus have already long been floating over the clearings, in the distance looking like black spots, when the sun has begun to beat down with full power on the leafy dome of the forest and M. menelaus has finished its flight, cisseis then moves slightly forward on the leaf on which it passed the night, and opening the wings it slips with a bound into the air, rising lightly to the tops of the trees, among which it takes its flight until the clearing of the road appears, which it now follows, pursuing its way quietly and steadily, with the powerful wings scarcely quivering.

It looks then like a narrow silver-blue stripe, in the vestal purity of its delicate white colour, which from the middle towards the costal margin changes into a light blue, posteriorly into black.

— At Iquitos and Yurimaguas on the Upper Amazon cisseis-obidonus is replaced by phanodemus Hew., the forewing of which in rare cases still bears traces of the hecuba colouring and is in part somewhat brown-yellow with the marginal area only slightly blue.

But examples with green-blue median band seem to be the commonest, this colour sometimes distally changing to olive-green or greenish brown and towards the base to light blue and white.

In the female the shades of colour are less ill-defined and there occur pure and uniform light, dark, steel- and green-blue tinged specimens, to which it may be left to others to give special names.