Caught by hand while it was flying (it was very slow!). I remember the wing cases being soft. Observation also entered here: https://bugguide.net/node/view/1663187
Fairly large Tabanid
At Solidago caesia
Believe one of these beetles to be parasitized with a Winsome Fly egg - looking for others to confirm
I'm aiming the eggs of the parasitoid on the pronotum.