This is a great golden digger wasp (Sphex ichneumoneus) on a rattlesnake master (Eryngium yuccifolium). They are also known as; digger wasp, or great golden sand digger.
Beewolves (Philanthus sp.), also known as bee-hunters or bee-killer wasps,
A female Velvet Ant (Dasymutilla occidentalis)., Red Velvet Ant, Eastern Velvet Ant, Common Eastern Velvet Ant, Cow Ant, and Cow Killer. They are called a cow killer, because it is said that their sting is so painful, it seems like it is bad enough to kill a cow.
