This paper presents results of a study of the Syrphidae fauna of Cameroon, based largely on an expedition to that country conducted in May 2006. Sixty-three species of Syrphidae were collected during the Expedition, 49 of which are newly recorded for the country, including some undescribed species. A preliminary checklist of the Syrphidae of Cameroon is provided, indicating that the Cameroonian Syrphidae fauna now comprises 96 species in total.