<ref name="Donisthorpe_1942">{{cite journal |first1=H. |last1=Donisthorpe |year=1942 |title=The Formicidae (Hym.) of the Armstrong College Expedition to the Siwa Oasis |url=https://antcat.org/documents/4957/5805.pdf |journal=Annals and Magazine of Natural History |publisher= |volume=9 |issue= |pages=26–33 |doi= }}</ref>