Oh Wow! I've had these guys in my oriole grape jelly feeder too Chico2! We had a terrible rain storm on Monday and when I came home from work, there was a container full of the black and white hornets swimming in what was then, grape juice!
I've never seen them before as well and thought they looked different. Heard about the onion but will also have to keep the parsley plant within arms reach.
Great thread!