BioStor
 | Descriptions of new genera and species of Asiatic nocturnal Lepidoptera F Moore (1881) Proceedings of the Zoological Society of London 1881: 326-380 |
 | On Halichœrus grupus and its Breeding on the Fro Islands off Throndhjems-fjord in Norway Robert Collett (1881) Proceedings of The Zoological Society of London 1881: 380-387 |