[2][1] Mycalesis perseus exhibits seasonal dimorphism with distinct wet-season and dry-season forms.

Underside: the groundcolour, subterminal and terminal lines on the wings as on upper-side, but crossed by a common purplish - white narrow discal fascia.

On the hind wing only the three posterior ocelli in a straight line, the rest strongly curved outwards.

Underside brown, more or less suffused with purple and irrorated with darker brown minute transverse strigae; the transverse discal band obscure, often merely indicated by black dots at the veins, occasionally bordered outwardly by an ochraceous diffuse band.

Ocelli obsolescent, but when present as mere minute dots their arrangement on the hind wing is as in the wet-season form.