Pictorial keys to the main species and species groups within the Simulium damnosum Theobald complex occurring in West Africa (Diptera: Simuliidae).

The purpose of this paper is to provide a relatively simple means for recognizing the six main vector species or species groups of the Simulium damnosum Theobald complex that can be distinguished primarily to assist non-specialists, technicians and field personnel who have to handle many specimens in a relatively short period of time.