Review on the chinch bugs (Hemiptera: Lygaeidae: Nysius) from Korea

The genus Nysius Dallas is the largest group in the subfamily Orsillinae (Lygaeoidea: Lygaeidae), and is a wellknown agricultural pest that mainly feeds on grains. In Korea, N. plebeius and N. hidakai are well known to be agricultural pests. In the present study, we recognized six species of the genus Nysius Dallas from the Korean Peninsula. Among these, N. thymi (Wolff, 1804) was reported for the first time in the fauna. We provided new host plants, a key to the species of the genus from Korea, descriptions and diagnoses of these species using photographs of adult specimens and genitalia. We also present discussion on wrong host plants records of agricultural crops caused from misidentifications between N. plebeius and N. hidakai in Korea. Additionally, we confirmed that N. eximius and N. expressus are not occurring from South Korea based on the South Korean materials.