We recognize a new species, belonging to the genus Neopsephus Kishii 1990, from Is. Jeju. The novel species is closely allied to N. takasago Kishii 1990 known from Taiwan. This study provides the detailed morphological characteristics investigated by SEM and molecular data inferred from COI and 16S rRNA of mitochondria.

• Taeman Han(Applied Entomology Division, Department of Agricultural Biology, National Academy of Agricultural Science)
• Jong Chel Jeong(Seodaemun Museum of Natural History, Division of Entomology, School of Agricultural Biotechnology, Seoul National University)
• Young Bo Lee(Applied Entomology Division, Department of Agricultural Biology, National Academy of Agricultural Science)
• Seunghwan Lee(Seodaemun Museum of Natural History, Division of Entomology, School of Agricultural Biotechnology, Seoul National University)
• Hae Chul Park(Applied Entomology Division, Department of Agricultural Biology, National Academy of Agricultural Science)