Caloptilia Hübner, 1825 is one of the largest genera in Gracillariidae. 314 species have been known around the world. To date, 19 species were known from Korea. In the present study, one species, C. acericola (Kumata, 1966), is newly recognized from South Korea. Caloptilia acericola was first described from Japan and it also distribute Russian Far East. The name of this species was derived from the genus name (Acer, Aceraceae) of its host plant. We redescribed with illustrations of adults and genitalic structures to distinguish the species from the congeneric species in South Korea.

• Young-Min Shin(Division of Forest Biodiversity, Korea National Arboretum, Biological Science & Biotechnology, Hannam University)
• Bong-Kyu Byun(Biological Science & Biotechnology, Hannam University)
• Jung-Dal Sohn(Division of Forest Biodiversity, Korea National Arboretum)
• Sang-Yong Kim(Division of Forest Biodiversity, Korea National Arboretum)
• Il-Kwon Kim(Division of Forest Biodiversity, Korea National Arboretum)