The caterpillar lives with the ichneumon grubs within it usually until nearly time for its pupation.
Pupate, pupation: to become a pupa: the act of becoming a pupa.
When mature, it often leaves its burrow and wanders in search of a suitable place for pupation.
In about two weeks from the time of pupation, the moths appear.
When full grown "it spins together the stems of the grass low down, with a network of white silk for pupation" (Hawes).
The chrysalids are, however, never closely appressed to the surface upon which pupation takes place.
Their particular growth begins at the end of March, and they are ready for pupation up to May.
pupation generally takes place among fallen leaves or rubbish at the foot of the trees upon which the caterpillar has fed.
He adds that caterpillars measuring about an inch in length when collected, were preparing for pupation a week later.
To see whether it was essential that the exposure should take place immediately after pupation, in order to effect any change.