Oil beetles belong to the family

Solution (By Examveda Team)

Oil beetles belong to the family Meloidae.
Meloidae is the family of beetles, so called for their defensive secretion of a blistering agent, cantharidin. About 7,500 species are known worldwide.
Oil beetles are a precious and declining group of five beetles that live in calcareous grasslands, dunes, heaths and woodlands. They are a member of the wider 'blister beetle' family, Meloidae. They are so-called because they squirt irritating oily droplets from their joints when alarmed.