The genus Periphyllus is tree-dwelling group, mostly on maple tree (Acer spp.). In this study, we discovered one species new to Korea, P. loricatus (Pashtchenko 1987) on A. ginalla. In prior to Pashtchenko(1987), Periphyllus ginallae Paik in Szelegiewicz (1974) seems the same species, nevertheless, treated as 'nomen nudum' without any description. As a result of our revision, totally seven species belong to this genus in the Korean peninsula.

• Yeyeun Kim(Insect Biosystematics Laboratory, Research Institute for Agricultural and Life Sciences, Department of Agricultural Biotechnology, Seoul National Universityum)
• Seunghwan Lee(Insect Biosystematics Laboratory, Research Institute for Agricultural and Life Sciences, Department of Agricultural Biotechnology, Seoul National Universityum)