A. procera is a widespread and common species in eastern North America. It has fairly distinctive, bold silver dashes (front-most interrupted) on the thorax, and is one of the largest members of the genus. However, certain identification as to species is probably not plausible based on photographs.
An example of what is probably A. procera:
Widespread in North America
Varied. Often seen on flowers.
June-October, mostly July-August (Michigan). May-October (North Carolina)
Provisions nest with sawfly or lepidopteran caterpillars.
Salsbury, pp. 284-285, has photo of A. procera and description. (1)
--brief life history