Spanish Fly

Spanish fly is an emerald-green beetle, Lytta vesicatoria, in the blister beetle family (Meloidae). It and other such species were used in preparations offered by traditional apothecaries, often referred to as Cantharides or Spanish fly. The insect is the source of the terpenoid cantharidin, a toxic blistering agent once used as an aphrodisiac.
L. vesicatoria is sometimes called Cantharis vesicatoria, although the genus Cantharis is in an unrelated family, Cantharidae, the soldier beetles.
== Description ==
Lytta vesicatoria is a slender, soft-bodied metallic and iridescent golden-green insect, one of the blister beetles. It is approximately 5 mm (0.20 in) wide by 20 mm (0.79 in) long.
The generic and specific names derive from the Greek λύττα (lytta) for martial rage, raging madness, Bacchic frenzy, or rabies, and Latin vesica for blister.
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