The beetle family Phengodidae is odd any way you look at it. The adult female (not pictured) is larviform, which means she never loses her grub-like appearance as she grows into sexual maturity. She has no wings and no long antennae. But she does bioluminesce, and that gives the family their common name: Glow-worms.  In stark contrast to their grubby counterparts, male phengodids (as shown here) are delicate creatures, adapted for dispersal and mating.