Dotted Border pupates

A caterpillar that I found feeding on oak in Hawksworth Wood on the 14th May has now pupated.
The distinctive colouration of the pupa has now enabled me to identify the caterpillar as that of the Dotted Border (Agriopis marginaria).
Now the challenge is to try and keep it in the hope of the adult being the flightless female which I have never seen.