A tiny mantis that turned out to be a lacewing in disguise
On a September afternoon in Pittsburgh, this small insect sat on the surface in front of me, and for a moment I was sure it was a baby mantis. It had the folded, raptorial front legs and the alert posture. But something about the wings and the long, threadlike antennae said otherwise: it was a mantidfly, a lacewing that has reinvented itself as a miniature praying mantis.
This is Zeugomantispa minuta, a member of the mantidfly family Mantispidae in the order Neuroptera, the same order as lacewings and antlions. Its forelegs are armed with spines and held ready to snatch small insects, and it hunts like a tiny ambush predator. The species name minuta, meaning tiny, fits: it is small enough that it is easy to walk past.
Mantidflies have one of the strangest life stories among insects. The larvae of many species find spider egg sacs, crawl inside, and feed on the developing spider eggs, pupating inside the sac and emerging as winged adults. That means the fierce-looking adult starts life as a quiet thief in a spider’s nursery.
Finding one in the middle of the city is a good reminder that urban green spaces hold plenty of surprises. Mantidflies are never common anywhere, so each sighting feels like a small gift, and this one had chosen a quiet corner where the afternoon light caught its wings. I watched it for a while, then let it go about its business, a pocket predator with a lacewing’s pedigree and a mantis’s ambitions.
