Two species of the genus Cosmophorus (Hymenoptera: Braconidae) are reported in this study. Members of Cosmophorus are known as solitary koinobiont endoparasitoids of adults of barkboring and woodboring Scolytidae. The genus Cosmophorus of the subfamily Euphorinae is small in the size and enigmatic in the ecology, which has been recorded in Holarctic, Oriental, Afrotropical and Australian regions. Only five species are known in East Palaearctic. Among them, Cosmophorus (Cosmophorus) klugii Ratzeburg is new to Korea. Diagnosis and distribution data are included.

• An Tae-Ho(The Science Museum of Natural Enemies)
• Su-bin Choi(Department of Biology, Kunsan National University)
• Hyojoong Kim(Department of Biology, Kunsan National University)
• Ki-Gyoung Kim(National Institute of Biological Resources)
• Hong-Yul Seo(National Institute of Biological Resources)
• Deok-Seo Ku(The Science Museum of Natural Enemies)