Insect and Spider Identification: CLOSED: Help identifying thread-waisted wasp?, 1 by insectlady

insectlady wrote:
It also may be a Potter's Wasp, from looking at the photos.

Potter's Wasps make little jug shaped nest of mud that are maybe 1/2 inch across when they are finished. I'm attaching my late father, Philip Bergh's slide of two Potter's wasp nests he found in NYC, NY.

The wasps are black with a thin whitish/yellowish stripe too, but have a slightly bulging abdominal segment, while the other solitary wasps have smooth abdomens.