6.3mm length. Found this guy by using sweeping net near our spring. ID by J.D. Pinto via v belov @ BugGuide.
12.5mm length. Found on Holocarpha virgata. ID by v belov @ BugGuide.
Blister beetles are beetles (Coleoptera) of the family Meloidae, so called for their defensive secretion of a blistering agent, cantharidin. There are approximately 7,500 known species worldwide. Many are conspicuous and some aposematically colored, announcing their toxicity to would-be predators.