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Common Name:Beetle, Arizona Blister
Scientific Name:Lytta magister
Family:Meloidae (Blister Beetles)
Area:Lightning Bolt Trail - Buckskin Mountain State Park, Arizona
Date:March 6, 2010

Blister Beetles contain the chemical cantharidin, which causes blisters on human skin.

Reference:National Audubon Society Field Guide to North American Insects & Spiders