The last observed of c. two-dozen larvae; and the only one
collected and brought indoors (11-September) where it fed on
Northern Prickly Ash for only two more days before pupating.
Unlike other late-instar larvae seen, appearing to be smaller,
this one apparently skipped the larger last instar, yielding
this small "Spring form" adult.  Forewing length, only 47mm.
Room kept at 62F.  Light from east & south windows.
Eclosion, 26-Feb-2013.
                                                       D J Hoag, Grand Isle, VT