<ref name="Stephens_1829">{{cite book |first1=J. F. |last1=Stephens |year=1829 |title=A systematic catalogue of British insects: being an attempt to arrange all the hitherto discovered indigenous insects in accordance with their natural affinities |url= |location=London |publisher=Baldwin & Cradock |pages=xxxiv + 416 + 388 pp. |isbn=}}</ref>