Ormia : A genus of tachinid flies. Ormia larvae are parasitoids and their hosts included cone-headed grasshoppers, field crickets, and mole crickets. Ormia is usual among tachinid flies because larvae hatch from eggs inside their mother, where they begin their development, so she gives birth to larvae (not eggs). They also are unusual because females locate their hosts by the singing of the hosts. Some of the species included are Ormia depleta (native to South America), Ormia lineifrons (native to North America), and Ormia ochracea (native to North America).