What is a Blister Beetle and What Does it Look Like?
Blister Beetles are members of a family of plant-feeding insects (Meloidae) that contain a toxic defensive chemical known as cantharidin. This chemical protects them from predators. Accidentally crushing a Beetle against the skin can result in a painful blister, the source of the insect’s common name.
Blister Beetles have long (3/4 to 1-1/4 inch) narrow bodies, broad heads, and antennae that are about 1/3 the length of their entire bodies. The front wings are soft and flexible in contrast to the hard front wings of most Beetles.