“Blister beetles are attracted to blooming alfalfa,” says Muegge. Nectar and pollen of various flowers, especially those in the Aster (Asteraceae) family. 1.) Blister Beetle Bites Identification of Blister Beetle Warts. Another name for the Meloidae family is "blister beetles." Infestations often occur during or just following a grasshopper outbreak. Blister beetles are common in many parts of the world, including the Northeast. Blister beetles receive their common name from the ability of their hemolymph to produce blistering on contact with human skin. They occur on southern Europe, southern Africa, and in the Americas. They are uncommon in Minnesota. Unless extensive, medical tr… In the United States they are most common in the southwest. The protruding mouthpart(s) of a sucking insect. Being a member of the beetle family Meloidae, the menacing-looking beetle can cause skin blistering if you touch it. The common name for blister beetles comes from the irritating reaction the beetle’s body fluids cause on animal skin or delicate membranes. Any beetle images and site inquiries can be submitted to beetleidentification at gmail.com. Blister Beetles. Most are active, colorful beetles, of green, blue back, spotted, or grey. The outer lower mouth parts (galeae) are greatly elongated into a sucking tube, allowing the beetles to drink flower nectar. As little as four (4) to six (6) grams of blister beetles can be deadly to an 1100 lb. Plural: tarsi. They feed on flowers, and sometimes leaves, of many plant species. horse. Flat mouth parts and a square-shaped head are connected to the abdomen and wings by a narrow neck. Fluids are released when the beetle is crushed or handled roughly. Polyphaga (water, rove, scarab, longhorn, leaf and snout beetles). They are found in most parts of Canada and the US. There are many insects such as flies, bees and bugs which eat dead or live blister beetles to gain protective qualities of the chemical defense. Hemolymph is often exuded copiously by reflexive bleeding when an adult beetle is pressed or rubbed. They are uncommon in Minnesota. Striped Blister Beetle (picture by: Steve Scott) This is the variety that blistered me, and from what I've read this species contains higher concentrations of cantharidin than the other two species pictured here. The blister beetle cancer "cure" has an element of truth in it. The adult beetles are 1/2 to 3/4 inch long, slender and the elytra or wing covers soft and flexible. The ash-gray blister beetle is about 1/2 inch long and is completely gray. Blister beetle, (family Meloidae), any of approximately 2,500 species of beetles (insect order Coleoptera) that secrete an irritating substance, cantharidin, which is collected mainly from Mylabris and the European species Lytta vesicatoria, commonly called Spanish fly.Cantharidin is used medically as a topical skin irritant to remove warts. These insects obtain immunity from the Canthaidin chemical and re… > Garden Pests > Beetles, bugs, ants, and other insects without obvious wings - Larger than 1/2 inch long > Blister beetles, Jeff Hahn, University of Minnesota Extension. The name blister refers to the chemical cantharidin in their bodies. Accidental ingestion of blister beetles, blister beetle body parts or dried cantharidin fluids may be fatal to livestock. Management. Ant-like head. Additionally, the striped blister beetle is a species which seems to live in larger communities or clusters and are usually found along the edges of the fields instead of being more spread out. Blister beetles are hypermetamorphic, going through several larval stages, the first of which is typically a mobile triungulin. Antlions, Owlflies, Lacewings, and Mantidflies. Oily secretions from their joints can raise blisters on skin. They’re also found in the grassland… They occur on southern Europe, southern Africa, and in the Americas. Their antennae are about 1/3 the length of their bodies. General handling of adults seldom results in blistering unless the hemolymph contacts the relatively thin skin between the fingers. Attach one or more photos and, if you like, a caption. Black Blister Beetle 3.) When the larvae hatch, they attach themselves to visiting bees and are carried back to the bee’s nest. They have narrow and elongated bodies which can be striped, brown, black or metallic green in color. Cantharidin is a stable chemical and a long-term health threat to nearly all livestock (particularly horses) that are fed contaminated hay. 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