Two new records of subgenus Platysoma Leach, 1817 are identified from Korea: Platysoma (Platysoma) takehikoi Ôhara, 1986 and Platysoma (Platysoma) vagans Lewis, 1884. Herein, we provide a key to species of subgenus Platysoma, with diagnoses and images for newly recorded species.

• Jinbae Seung(Laboratory of Insect Biosystematics, Department of Agricultural Biotechnology, Seoul National University, Research Institute of Agriculture and Life Sciences, Seoul National University)
• Seunghwan Lee(Laboratory of Insect Biosystematics, Department of Agricultural Biotechnology, Seoul National University, Research Institute of Agriculture and Life Sciences, Seoul National University)