Mimicry is a common enough phenomenon in the insect world, but the parasitic blister beetle, Meloe franciscanus, takes deception to new heights. The larvae of this beetle actually pile together in order to give off a chemical signal that mimics the sex pheromone of the female Habropoda pallida, a type of solitary bee. When a male bee attempts to mate with a larvae cluster, some of the mimics stow away on his back. When he finally mates with an actual female bee, the larvae transfer to the female, which unwittingly takes them back to her nest where they can live at her expense. This novel combination of cooperation, parasitism and chemical mimicry is reported in the current issue of the Proceedings of the National Academy of Science.