Through the kindness of Dr. G. A. K. Marshall, of the Imperial Bureau of Entomology, and Mr. F. W. Edwards, of the British Museum, we have been enabled to examine the two small but interesting collections of African Ceratopogoninae which form the basis of this paper. We have attempted to determine or describe the majority of the specimens, but those belonging to the genus Forcipomyia we hope to deal with at some future time. Several species were represented by single or but few specimens, some of them damaged; further material is therefore much to be desired not only to confirm and complete the descriptions given, but also to determine the ranges of variation.