A new species of toad, related with Bufo calamita Laurenti and B. viridis Laurenti, is described from the southern part of Morocco. Combining the data of the available specimens with literature records it was established that the new species probably ranges from the Sous valley southwards to Cape Bojador in the Spanish Sahara. The species seems to be restricted to semi-arid habitats. Tadpoles which probably belong to this species are described. Keys for the identification of adult toads and for the tadpoles are given.