Evidently I didn't look at this photo carefully enough the first time. The first tergite is deep orange, and the last three abdominal segments are black (albeit the last two are covered with silvery pubescence), all three of the first tergites are orange. It also has very obvious fasciate wings. This matches Bradley's keys and his species description almost perfectly. For a full citation of Bradley (1944) or complete descriptions of any of the North American genera of the tribe aporini contact me directly at the e-mail listed under my account. This is a difficult piece of litertaure to find. Even the enormous library at Ohio State didn't have it.

Looks to me like a spider wasp in the family Pompilidae, but never seen anything like it! Could be a teneral (just emerged from pupa), and therefore the pigment has not darkened yet. Beautiful shot. Got more wasps? If so, please see the "field guide" entry in the forum section. Thank you.