<ref name="Saunders_1890">{{cite journal |first1=E. |last1=Saunders |year=1890 |title=Aculeate Hymenoptera collected by J. J. Walker, Esq., R.N., F.L.S., at Gibraltar and in North Africa. (Part I - Heterogyna) |url=https://antcat.org/documents/2665/3593.pdf |journal=Entomologist's Monthly Magazine |publisher= |volume=26 |issue= |pages=201–205 |doi= }}</ref>