Abstract
I revise the Japanese species of the genus Pseudostenophylax Martynov (Trichoptera, Limnephilidae), and recognize 8 species including five new species, P. tohokuensis, P. kuharai, P. itoae, P. tanidai and P. befui, and three previously de-scribed species, P. tochigiensis Schmid, P. ondakensis (Iwata) and P. dentilus (Kobayashi). Pseudostenophylax takaoensis Schmid is synonymized with P. ondakenis. Adults and larvae of all species are described or redescribed except for the larval stage of P. befui sp. nov.