Overwintering Wood Nymph (Cercyonis pegala) larvae

[Dale Clark]

Does anyone have any experience at overwintering Cercyonis pegala
larvae?  I've got a bunch of eggs at the moment (which I expect to hatch
soon) and have never raised this species before.  From what I can find
out they overwinter as newly emerged larvae without ever having fed. 
Can anyone point me in the direction of some literature  on the best way
to keep these guys alive through a north Texas winter.  Or if anyone has
any personal experience that would be great too.

Thanks

Dale Clark
Dallas County Lepidopterists' Society
Dallas, TX