<ref name="Cresson_1865">{{cite journal |first1=E. T. Sr. |last1=Cresson |year=1865 |title=Catalogue of Hymenoptera in the collection of the Entomological Society of Philadelphia, from Colorado Territory. [concl.] |url=https://antcat.org/documents/827/6249.pdf |journal=Proceedings of the Entomological Society of Philadelphia |publisher= |volume=4 |issue= |pages=426–488 |doi= }}</ref>