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Quoting Professor Donald Chandler who is summarizing the recent literature: "There was only one species (the Holarctic A. leucopeza) known from North America until the revision by Wayne Mathis and Amnon Friedberg in 1994. A. leucopeza was restricted to the Palearctic region, and what had been called "leucopeza" in North America became three new species. The species do look a lot alike, and if you are unaware of this paper, and familiar with earlier records of leucopeza from North America, leucopeza would be a logical identification. However, it is no longer the correct name, and I don't know which of the two Northeastern species your photo shows."

Don was commenting on someone else's photo on BugGuide.

Nomina Nearctica has this listing for the genus in North America:

Aulacigaster mcalpinei Mathis and Freidberg 1994 (Aulacigaster)
Aulacigaster neoleucopeza Mathis and Freidberg 1994 (Aulacigaster)
Aulacigaster sabroskyi Mathis and Freidberg 1994 (Aulacigaster)