<ref name="Smith_1851">{{cite book |first1=F. |last1=Smith |year=1851 |title=List of the specimens of British animals in the collection of the British Museum. Part VI. Hymenoptera, Aculeata |url=https://antcat.org/documents/2727/8200.pdf |location=London |publisher=British Museum |pages=134 pp. |isbn=}}</ref>