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Forgot to post it here again, but here is the arthropod of yesterday:

The robber fly is a predator of almost all flying insects. It injects a fluid into its victims that breaks down the muscle tissue. A few species of the genus Promachus are serious pests of apiaries because they feed on bees. Each species has a characteristic habitat—e.g., tree trunk, foliage, grass, low plant, dead twig, gravel, or beach sand.

Adults lay eggs in the soil or in plants. Eggs hatch into slender, shiny, white, legless larvae that develop through several stages before pupating. The life cycle usually requires more than one year to complete.

Adults have piercing-sucking mouthparts. Adult robber flies perch on stems of low plants or other objects and attack prey in the air. They feed on bees, beetles, dragonflies, other flies, grasshoppers, leafhoppers, wasps, and other insects. Larvae live in the soil, in wood and other habitats, feeding on organic matter, other arthropods such as white grubs, beetle pupae and grasshopper egg masses, and they may be carnivorous.

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