A report is given of a case of black grain maduromycosis in a 38 year old man living on Curaçao, Netherlands Antilles. The silver-impregnation method for staining reticulin is successfully used for staining of the fungi in tissue sections. The causative fungus isMadurella mycetomi (Laveran)Brumpt. The isolated strain differs from the usual isolations of this species by its very faint pigment production into the medium. The cultural and microscopical characters of this strain are described.