This is the pupal case protruding from the top of the hazelnut piece, undisturbed since the moth left it. The exposed part of the case was 4 mm long. I cut the nut apart and found the posterior end of the case, an additional 1.5 mm, inside it. (When I opened the nut, the case broke off flush with the surface.) The posterior end was rounded, not pointed. The pupa had formed in a narrow channel carved out of the nut, with its anterior end next to the opening. The site of this opening had been visible for weeks as a translucent spot on the surface, a tiny thin place, not an actual hole.

I can only guess that in nature these larvae might begin by eating the flesh of fruits with hard seeds and take up residence in a seed during later instars. Perhaps the nut or seed is optional and the larva would have pupated in the raisin if nothing else had been available.