M.L. IIRC you have a good background with wasps. I am trying to remember the name of a predator wasp. Solid back, from what I can tell.. Has a tail similar to a scorpian. When it flies, it looks like it has a fish hook for a tail. A little smaller than common hornet/wasp Best I can recall a double wing like a dragonfly. I can't seem to find the right keyword for search to find it. Thank You Byron