From BugGuide: Trogus pennator is a parasitic ichneumon wasp which lays its egg in the caterpillars of swallowtail butterflies.The larva that hatches eats the caterpillar from the inside out, but still allows it to pupate before killing it. After metamorphosing, the adult wasp chews an irregular hole in the chrysalis to escape.

Family Ichneumonidae - Ichneumon Wasps
Subfamily Ichneumoninae
Tribe Heresiarchini
No Taxon Callajoppa Genus Group
No Taxon Trogus Subgroup
Genus Trogus
Species pennator - Trogus pennator