Dave, that is what I call a flowerfly! Great disguise, huh? It is a fly, who for defensive reasons looks like a wasp. They visit flowers for nectar. You can tell it is a fly when you look at the eyes and wing-shape. Also, the abdomen will be shorter, and often flattened.
Okay, after looking it up, it is likely the american hover fly, Metasyphus americanus. Adult drinks nectar, larva preys on aphids and larvae of scale insects.