Exochilum Mundum (Say) Ophion Mundus (Say) Therion morio is a species of parasitic ichneumon wasp in the family Ichneumonidae.

[6] T. morio adults lay their eggs inside webworm caterpillars by piercing them with their ovipositor.

[6] Like H. fulvipes, their eggs consist of an equatorial disc and a caudal stalk, making them look a bit like the cartoon oil lamp from Aladdin.

[7] It's thought that the shape is adapted to attach the egg to the inside of the caterpillar's integument.

The second stage larva emerges from this inner membrane and continues to feed on the caterpillar.