Heteropelma is a genus of parasitoid wasps belonging to the family Ichneumonidae.

[2] Heteropelma adults lay their eggs inside Lepidopteran larvae (i.e. caterpillars) by piercing them with their ovipositor.

Heteropelma eggs consist of an equatorial disc and a caudal stalk, making them look a bit like the cartoon oil lamp from Aladdin.

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

[3] Once the eggs hatch, the larvae consume the caterpillar from the inside.