they are Pepsis or commonly known as tarantula wasps. a coworker warned me that his cattle did not like the sting and to avoid getting stung by one @ all costs. i kinda thought he may have been trying to get a rise out of me- but he wasn't kidding!
Identification Large blue-black wasps, most with orange wings. Some species have orange antennae. Females have curled antennae, males straight. Among the largest and most easily recognized genera of...