Heliconius charithonia pupal mating behaviour observed by Andrei Sourakov. This is a little while after the previous photo and the female has now emerged and is extending her wings. See full description here

Heliconius charithonia pupal mating behaviour observed by Andrei Sourakov. Here you can see that one male (left) has inserted his abdomen into the female pupa (centre). Another male is also perched on the pupa (right). See full description here