Periconia manihoticola was isolated from diseased leaflets of Hevea brasiliensis Muell.-Arg. and inoculated in young healthy plants grown in nutrient agar and in older rubber plants grown in pots. The fungus proved, for the conditions prevailing around Campinas, to be a weak parasite. Out of the thirty-two inoculated young leaflets of the second lot only two took the disease, while the plants were under high humidity. The lesions stopped growth when the humidity decreased. Upon bringing inoculated young plant grown in nutrient agar showing lesion in a leaflet, under conditions of high humidity, the lesion increased, distortion of the leaflet occured, and from the lesion the fungus was reisolated. The fungus was described as Haplographium manihoticola Vincens (11), but proved to belong to Periconia. The transfer of the species to Periconia is suggested, and in this transfer the name Periconia hevese Stevenson et Imle, should be taken as a synonym. Thus the correct name of the fungus should be Periconia manihoticola (Vincens) n. comb..