The Great Eggfly is a black-bodied butterfly with a wingspan of about 70–85 mm. The upper side of the wings are jet black, offset with three pairs of white spots & two on the forewing and one on the hind. These white spots are surrounded by purple iridescence. In addition, the upper side of the hind wing bears a series of small white dots.
The upper side of the wings of the female is a brownish black and does not have any spots like those of the male. The edges bear white markings which are similar to those of the Common Indian Crow.