The larva then locks in a cylindrical capsule called puparium.

Then the larvae encapsulate in the puparium and undergo a five-day-long metamorphosis, after which the adults emerge.

Larvae do not emerge from the leaf, but form the puparium within the mine made by the larva.

Larvae do not emerge from the leaf, but form the puparium within the mine made by the larva.

When mature, the larva emerges from the leaf through a slit in the mine, and forms a puparium which is initially pale but which becomes dark brown.