EN
Two smut fungi from Indian Ocean islands are described, illustrated and discussed. Sporisorium themedae (Duke) Vanky on Themeda quadrivalvis (L.) Kuntze is reported for the fi rst time from Mauritius, and from the Madagascan subkingdom of the Paleotropics as a whole. Tilletia mauritiana Vanky on Brachiaria umbellata (Trin.) Clayton is new to Madagascar. This smut was hitherto known only from the type locality in Mauritius, and the present finding extends its geographic distribution ca 900 km westwards.