I — C. striata sp. n. (<J holotype: Ranohira, Fianarantsoa prov., Madagascar) is described and illustrated. All known members (d) of the genus are keyed, and 3 groups of species are tentatively proposed on the basis of prophallic features, viz. s e r v i 1 i a (servilia, nigrifrons, striata), sanguinolenta ( sanguinolenta, divisa), anderythraea. C. erythraea stands apart from all other taxa, hence, as far as the structure of the prophallus is concerned, servilia and erythraea should be considered as distinct species.