The Great black wasp female digs tunnels in which to drag paralyzed katydids – food for larvae when they hatch. She will lay one egg on each then close up the connecting tunnels. The males pretty much spend their time drinking nectar and fending off other male wasps. The wings are black and a beautiful iridescent blue. The Golden digger has a similar lifestyle. It has yellow, fuzzy shoulders and bright orange legs and abdomen.
These guys were about 1 1/2 inches long. They do sting but they are not aggressive and are beneficial to gardens.