The beetle has 4 stages in its life cycle.
Stage 1: Egg
Female lays eggs on leaves. Some keep their eggs inside and give birth to larva which is the next stage.
Stage 2: Larval Stage
The larva lives on plants.
They are very hungry and feed on leaves, and wood. At this stage, they can damage wooden structures.
When larva grows, it sheds it outer covering (Exoskeleton) many times. This process is called moulting.
Stage 3: Pupal
The larva changes into pupa and attaches itself to the plant.
At this stage, it stops feeling and grows into an adult inside the pupal case/ cocoon.
Stage 4: Adult Beetle
The adult beetle comes out of the cocoon, dries its wings and is ready to fly.
This adult is now ready to reproduce and this life cycle will repeat all over again.