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.
Known Species per The California Beetle Database .
Cenophengus debilis
Distremocephalus californicus
Distremocephalus opaculus
Zarhipis integripennis
Zarhipis truncaticeps