The genus Mesocallis Matsumura, 1919 is reviewed from the Korean peninsula. Total of five species are recognized by adding two new and one new unrecorded species to current two recorded species. In this study, diagnosis and illustrations for all five species are presented.

• Yerim Lee(Laboratory of Insect Biosystematics, Department of Agriculture Biothechnology, Seoul National University)
• Seunghwan Lee(Laboratory of Insect Biosystematics, Department of Agriculture Biothechnology, Seoul National University, Research Institute of Agriculture and Life Sciences, Seoul National University)