cruddy picture, it wouldn't let me get close
With some friends, I watched several of these wasps flying back and forth and bringing these bright green katydids to these little sandy patches.
The open sandy patches turned out to be the throw mounds of their burrows. I watched 2 different wasps pull down these katydids into these burrows.
Saw a few Great Golden Digger wasps feeding on Swamp Milkweed plants in my rain garden.
Great Golden Digger Wasp
I've now seen this monster on the coast and the High Sierra this season.