In Korea, species of the genus Ptecticus Loew, 1855 (Family Stratiomyidae) have been known as three species, P. aurifer (Walker, 1854), P. matsumurae Lindner, 1936 and P. japonicus (Thunberg, 1789) (= P. tenebrifer (Walker, 1849)). Additionally, an unrecorded species, P. sinchangensis Ôuchi, 1938, is founded in South Korea. We therefore report the species for the first time in Korea with morphological diagnoses and key for the identification of species of the genus. In total, the members of the genus Ptecticus are officially recognized as four species in Korea.

• Taeman Han(Applied Entomology Division, Department of Agricultural Biology, National Institute of Agricultural Science)
• Seung-Hyun Kim(Applied Entomology Division, Department of Agricultural Biology, National Institute of Agricultural Science)
• Tae Hwa Kang(Bio Control Research Center, Jeonnam Bioindustry Foundation)
• In Gyun Park(Applied Entomology Division, Department of Agricultural Biology, National Institute of Agricultural Science)
• Haechul Park(Applied Entomology Division, Department of Agricultural Biology, National Institute of Agricultural Science)