The genus Phyllocnistis belongs to the family Gracillariidae including 85 described species in the world (De Prins and De Prins 2005). The genus has been placed under the family Phyllocnistidae, which is now the subfamily of the family Gracillariidae.
In Korea, only one species of the family, Phyllocnistis citrella Stainton has been listed for the first time by Ko (1969) without the taxonomic information. It was first reported by Heppner (1993) from North America, and it has become to the major pest of Rutaceae, especially damaging on the genus Citrus spp. It has been called as CLM (citrus leafminer) in the world. This study was carried out to identify and monitor CLM easily and correctly with providing the genitalic structures and DNA barcode which is now one of the major insect pest on citrus farm.

• Da-Som Kim(Department of Biological Science and Biotechnology, Hannam University)
• Chung-Won Choi(Department of Plant Biotechnology and Plant Engineering Research Institute, Sejong University)
• Sanghyeob Lee(Department of Plant Biotechnology and Plant Engineering Research Institute, Sejong University)
• Bong-Kyu Byun(Department of Biological Science and Biotechnology, Hannam University)