An updated checklist of the robber flies of Gambia with the description of a new Sphagomyia Londt, 2002 (Diptera: Asilidae)

A remarkable collection of 298 Gambian Asilidae collected by William F. Snow between 1974 and 1977 and housed in the collections of the Oxford University Museum of Natural History was recently reported upon (Londt 2010). Another collection comprising 196 specimens, collected by Snow from 1969 to 1973, became available for study and the results are reported here. A new species, Sphagomyia gambia, is described and many new records for previously listed species supplied. Nine species are recorded for the first time and a complete list of Gambian Asilidae is provided. With 68 species, The Gambia has West Africa's richest recorded asilid fauna.