Abstract
A description is provided for Diabole cubensis. Information is included on the disease, leaf rust of Mimosa pigra, caused by the organism. Details are given of its transmission, geographical distribution (Mexico (Guerrero, Michoacan, Oaxaca, Tabasco and Veracruz), Costa Rica, El Salvador, Brazil (Bahia and Espirito Santo), Colombia and Australia (Northern Territory)) and hosts (Mimosa pigra var. pigra and M. pigra var. berlandieri).