EN: Blister beetle, DE: Ölkäfer. They secrete cantharidin, a poisonous chemical causing blistering of the skin and painful swelling. Blister beetles are hypermetamorphic, going through several larval stages, the first of which is typically a mobile triungulin. The larvae are insectivorous, mainly attacking bees. Remarkable parasitic behavior Meloe proscarabaeus and Meloe violaceus identification. Superfamily Tenebrionoidea