Common Mormon

Jet black butterfly with row of white spots along the middle part of hindwing. 90–100 mm.
The male has one morph only. It is a dark-coloured swallow-tailed butterfly. The upper forewing has a series of white spots decreasing in size towards the apex. The upper hindwing has a complete discal band of elongated white spots. It may or may not have marginal red crescents. The males are generally smaller in size than the females but not always. Both male and all forms of the female of P. polytes can vary considerably in size depending on climatic region.
The female of the Common Mormon is polymorphic. In South Asia, it has three forms or morphs. These are as follows:
Form cyrus
This form is similar to the male, differing in that it always has strongly marked red crescents. It is the least common of the three forms. It is normally abundant where the common rose or crimson rose do not occur, such as in Himachal Pradesh around Shimla; although a few specimens of form romulus have also been caught alongside.
Form stichius
This female form of the Common Mormon mimics the common rose very closely. This is the commonest form wherever the common rose flies.
Form romulus
This female form mimics the crimson rose and is common over its range. It is not such a close mimic as the previous form being duller than its model. It is easy to differentiate the mimics from models by the colour of their body—the models are red-bodied and the mimics are black-bodied.