Chen, X. and Xu, H. 2009. A key to species of the genus Hylaeus (Hymenoptera: Colletidae) from mainland of China with descriptions of new species and new records. Zootaxa. 1974, 1 (Jan. 2009), 31–50. DOI:https://doi.org/10.11646/zootaxa.1974.1.3.