ABSTRACTIn this report on black mildew and fly-speck fungi from Brazilian Amazonia, ten new species and three new varieties are described and one new combination is made. A few known taxa are discussed. The new species are:Asteridiella euphorbiacearum, Meliola brevispora, M. chrysobalanacearum, M. torulosispora, Lasiostemma minutum, Vizella amazonica, Asterina laevipodia, A. stipitipodia, Leptophyma grandispora, andAsterostomella stipitipodia.The last-named is the anamorph ofAsterina stipitipodia.The new varieties are:Asteridiella chardonianaHansf. var.magnispora, Meliola caesalpiniae(Hansf.&Deighton) Hansf.&Deighton var.bauhiniae, andViegasia costaricensis(Sydow) Bat.&Vital var.effusa. Microthyriella chandleriHansf. is recombined asMycerema chandleri(Hansf.) Farr.