A predatory genus Cryptalaus Ôhira, 1967 (Coleoptera: Elateridae) in Korea is taxonomically reviewed in this study. Up to date, two species of the genus Cryptalaus, C. berus Candèze, 1865 and C. larvatus pini Lewis, 1894, have been reported from Korea. From the present study, C. yamato Nakane, 1957 which has been regarded as an endemic to Japan, is reported from the Korean peninsula for the first time. A key to the Korean species of the genus Cryptalaus, diagnosis, illustrations of diagnostic characteristics are provided.

• Ik Je Choi(Division of Forest Biodiversity, Korea National Arboretum)
• Taeman Han(Applied Entomology Division, National Academy of Agricultural Science)
• Jeong-Dal Sohn(Division of Forest Biodiversity, Korea National Arboretum)
• IL-Kwon Kim(Division of Forest Biodiversity, Korea National Arboretum)
• Jong Woo Nam(Division of Forest Biodiversity, Korea National Arboretum)
• Young Min Shin(Division of Forest Biodiversity, Korea National Arboretum)
• Jongok Lim(Division of Forest Biodiversity, Korea National Arboretum)