Production of cellulolytic enzymes on bagasse under solid state fermentation by coculture of Aspergillus ellipticus and Aspergillus fumigatus was studied. Cocultivation of A. ellipticus and A. fumigatus showed improved hydrolytic and beta-glucosidase activities as compared to the occasions when they were used separately. Various pretreatment methods were used to make cellulose accessible to enzymatic attack. Best results were obtained through pretreatment with 2% (w/v) calcium hydroxide. Maximum enzyme production was obtained after 8 d of fermentation process.