A general survey of Aedes, subgenus Diceromyia, in Madagascar was conducted. Four species were obtained as follows: Aedes madagascarensis Van Someren, Ae. grassei Doucet, Ae. tiptoni Grjebine, and Ae. coulangesi Rodhain et Boutonnier. The morphological and biological characters of the subgenus, as well as those of each Madagascarian species, are reviewed and discussed. A key for identification of male and females is given.