Hastings, Jon M., Patrick J. Schultheis, Maggie Whitson, Charles W. Holliday, Joseph R. Coelho, and Angela M. Mendell. 2008. “DNA Barcoding of New World Cicada Killers (Hymenoptera: Crabronidae)”. Zootaxa 1713 (1). Auckland, New Zealand:27–38. https://doi.org/10.11646/zootaxa.1713.1.2.