SUMMARYThe perfect state ofHelminthosporium coicis, causing leaf-blight disease ofCoixspecies, was produced on Sachs agar medium with rice straw by the same method described in previous papers on perfect state formation ofH. orysaeandCochliobolus miyabeanus.Morphologically, the perfect state is somewhat different fromCochliobolus, especially in the existence of basal columnar stromata and of ascospore arrangement with parallel to loose coiling in the ascus. Thus a new genus,Pseudocochliobolus, is described.Pseudocochliobolus nisikadoiis designated as type species of the new genus.