Little is needed by way of introduction, beyond the statement that this paper is really a continuation of a previous one (“The African Species of Culex and allied Genera,” Bull. Ent. Res., Oct. 1911, pp. 241–268). In the present paper a complete synopsis is given of all the African species, with the exception of some of those already tabulated and of the genus Anopheles and its sub-divisions. Through the kindness of Prof. R. Newstead, the author has now been able to examine the types in the collection of the Liverpool School of Tropical Medicine, so that the number of undetermined species has been considerably reduced, and all have now been accounted for except those given as doubtful in the paper referred to.