Hemipepsis ustulata is a species of tarantula hawk wasp native to the Southwestern United States. Tarantula hawks are a large, conspicuous family of long-legged wasps that prey on tarantulas by using their long legs to grapple with their prey and then paralyze them with a powerful sting (ranked as one of the most painful in the insect world by the Schmidt sting pain index). They are solitary, displaying lekking territorial behavior in their mating rituals.

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