Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
University of Florida Extension document describing Blister Beetles found in that state. An annotated checklist, with some linked images, life history, lists of hostplants, and references.

Another version is at:

Blister Beetle
3 spotted ones eaten by a 1200 lbs horse can kill that horse - very dangerious to horses, please post.