The transition from larval stage L1 to L2 was distinguished
by the skin tissue that remained on the leaf disc
after moulting, which is easily recognized under a stereo
microscope. Pre-pupae are recognized by their short wings
sheaths. Pupae can be distinguished from pre-pupae by
their longer wing sheaths, which almost reach the end of
the abdomen. Both the pre-pupal and the pupal stages do
not feed or move unless disturbed. Adults can be recognized
by the presence of wings