Subject: What is this pretty bug?
Location: Toronto, Ontario
July 9, 2017 4:43 pm
I found this pretty bug flying around my bush and I don’t recall ever seeing one before. It’s purplish wings were really pretty in the sunlight. Could you please identify it for me?
The long antennae on this magnificent wasp caused us to correctly speculate it must be an Ichneumon, and we quickly identified it on BugGuide as Trogus pennator. According to BugGuide: “Trogus pennator is a parasitoid of swallowtail butterflies (Papilionidae), ovipositing in the caterpillars. The solitary larva develops inside the caterpillar, allowing it to pupate before killing it. After metamorphosing, the adult wasp chews an irregular hole in the chrysalis to escape.”