The orthotyline plant bug genus Ulmica is reported from Korean peninsula for the first time with one new species, Ulmica sp. sp. nov. Morphological diagnosis, the dorsal habitus and genitalia of both sexes are figured for new species. A key to the world Ulmica species is also provided to aid in their identification.

• Minsuk Oh(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)