<ref name="Collingwood_1961">{{cite journal |first1=C. A. |last1=Collingwood |year=1961 |title=New vice-county records for British ants |url=https://antcat.org/documents/733/11493.pdf |journal=Entomologist's Record and Journal of Variation |publisher= |volume=73 |issue= |pages=90–93 |doi= }}</ref>