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Spanish Fly (Lytta Vesicatoria)
A form of blister beetle, found in Spain and Southern France, whose body is pulverised to make an "aphrodisiac" preparation called cantharides (sometimes the powdered bodies are chemically treated to extract a drug - cantharidin. Cantharides and cantharidin are used on farm animals, but for human females they are dangerously and maddeningly irritating to the point where they can be quite lethal. The Marquis de Sade (1740-1814) was imprisoned partly for using cantharides.