Promachus rufipes (Robber Fly)

This is "the beast of the east" in the Robber Fly world. If it flies and is part of the Class Insecta I believe it will attempt to capture and eat it. These are large Robber Flies with two toned legs black and orangish-yellow, the alternating black and yellow of the abdomen and the dark dorsal side of the thorax. These robbers can be fairly common by August and early September.