<ref name="Donisthorpe_1941">{{cite journal |first1=H. |last1=Donisthorpe |year=1941 |title=[Review of: Snodgrass, R. E. 1941. The male genitalia of Hymenoptera. Smithson. Misc. Collect. 99(14):1-86.] |url= |journal=Entomologist's Record and Journal of Variation |publisher= |volume=53 |issue= |pages=80–84 |doi= }}</ref>