The Asian buprestid Agrilus subrobustus Saunders was first recorded from North America on the basis of three adults taken in sticky traps at a site in northwestern Georgia in 2006; nine adults since have been trapped at a site in eastern Tennessee. We collected adults of A. subrobustus by beating branches of mimosa (Albizia julibrissin) trees in the Southeast in 2007 (2 specimens) and 2010 (119 specimens). The collections represent the first records from Alabama (11 counties) and South Carolina (3 counties) and add to new records for Georgia (11 counties) and Tennessee (1 county). We map the known U.S. distribution of A. subrobustus and provide a description, diagnosis, photographs of the male genitalia, and color photographs of the adult to facilitate recognition of this adventive buprestid in the North American fauna.