Cantharidin, a poisonous chemical that causes blistering of the skin, is used medically to remove warts[REF] and is collected for this purpose from species of the genera Mylabris and Lytta, especially Lytta vesicatoria, better known as "Spanish fly".
Blister beetles are hypermetamorphic, going through several larval stages, the first of which is typically a mobile triungulin.