The adults have chewing mouthparts and their antennae are usually long.
Metamorphosis is complete, the life stages being the egg, larva, pupa, and adult.
The lacewings, also called aphidlions, are found on trees and other plants wherever aphids occur. The adults resemble damselflies but have readily visible antennae. The dobsonfly adults are found near streams and are often attracted to lights. The larvae are called hellgrammites. They live under stones in rapid running streams and are prized by fishermen because they make excellent bait.