Macrae, T. C. “Agrilus (s. str.) betulanigrae MacRae (Coleoptera: Buprestidae: Agrilini), a New Species from North America, With Comments on Subgeneric Placement and a Key to the otiosus Species-Group in North America”. Zootaxa, vol. 380, no. 1, Dec. 2003, pp. 1–9, doi:10.11646/zootaxa.380.1.1.