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Sphex pensylvanicus
A pretty iridescent blue-black wasp on the flowering catnip in my garden.
It does look like a spider wasp, but it's actually from the Sphecidae family - a digger wasp. They hunt katydids and other large insects and take them to underground nest sort of like what spider wasps do with spiders.
That looks like a spider wasp. Family Pompilidae. I can't help with a species ID much farther than that, though.