The Black Oil Beetle (Meloe proscarabaeus) is a European oil beetle. It lives in meadows, field margins and other warm sites in all but the far north of the continent. It lacks hind wings and the elytra are correspondingly reduced in size.
Eggs are laid in the soil by females. Then the larvae hatch, they climb into a flower, and await visiting solitary bees. With their well-developed claws, the larvae attach themselves to the bee and return with it to its nest. Here, they feed on the bee's eggs and the pollen and nectar it had collected. The larva pupates in the bee's nest, and leaves the nest to seek a mate directly afterwards.