Deudorix democles, Lycaenidae
Kings Plain Station, Cape York Peninsula, Queensland

These are fruit of the Strychnine Tree (Strychnos lucida).
A White-spotted Flash laid an egg on the outer skin. The hatchling caterpillar bored a tiny hole into the fruit, consumed the seeds, and pupated inside the fruit. When the adult emerged from its chrysalis, it bored its way out.
As expected, when I opened one of these fruits there was an old pupal case (exuvia) inside.