Phengodidae
 The beetle family Phengodidae is known also as glowworm beetles whose larvae are known as glowworms. The females and larvae have bioluminescent organs. They occur throughout the New World from extreme southern Canada to Chile. The family Rhagophthalmidae an Old World group used to be included in the Phengodidae.Larval and larviform female glowworms are predators feeding on millipedes and other arthropods occurring in soil and litter.