Caloptilia Hübner, 1825 is one of the largest group in Gracillariidae. 314 species have been known around the world. To date, 15 species were known from Korea. In the present study, four species of Caloptilia are newly recognized from Korean insect fauna: C. fidella (Reutti), C. hidakensis Kumata, C. illicii Kumata, and C. pulverea Kumata. All of 19 Korean species, including four newly recognized species, are redescribed with illustrations of adults and genitalic structures.

• Young Min Shin(Division of Forest Biodiversity, Korea National Arboretum)
• Bong Woo Lee(Division of Forest Biodiversity, Korea National Arboretum)
• Shin Young Park(Division of Forest Biodiversity, Korea National Arboretum)
• Bong-Kyu Byun(Department of Biological Science & Biotechnology, Hannam University)