Hongmin Hu, Minghui He, Youpeng Wu, Sihan Long, Xu Zhang, Lili Liu, Xiangchun Shen, Nalin N. Wijayawardene, Zebin Meng, Qingde Long, Jichuan Kang, and Qirui Li
Four new species, Xynobius azonius sp. nov., X. brevifemora sp. nov., X. duoferus sp. nov., and X. stipitoides sp. nov., are described and illustrated, and one species X. geniculatus (Thomson, 1895) is newly reported from South Korea. Xynobius geniculatus (Thomson, 1895) is redescribed and illustrated, and a new combination, Xynobius (Stigmatopoea) cubitalis (Fischer, 1959), comb. nov. is suggested. An identification key to the Xynobius species known from South Korea is provided.