SUMMARYA strain ofMonosporium apiospermum, when isolated from mycetoma of the foot, yielded only conidia. After it had been carried in culture for six years it began to produce ascocarps which were identified as those ofAllescheria Boydii.Production of both conidia and ascospores in cultures derived from single conidia and single ascospores proved that the two spore forms belong to one fungus, thatA. Boydiiis the ascocarpic stage ofM. apiospermum, and that it is homothallic.