During a recent study to understand an interaction of Collembola community and their environmental factors, two species in the genus Folsomia, F. quadrioculata Tullberg 1871 and F. octoculata Handschin 1925, were found in the forest of South Korea. From 2013 to 2015, these two species were sampled from six mountains and F. quadrioculata or F. octoculata was the dominant species in 5 sampling sites among 6 sampling sites. F. quadriocualta and F. octoculata were found in litter of deciduous and pine forest, respectively. Therefore, the major tree species seems to be one of the important factors determining their habitat. F. quadiroculata is newly recorded from the Korean Peninsula and F. octoculata is redescribed based on new materials from South Korea.

The genus Xenylla Tullberg in the family Hypogastruridae is cosmopolitan, containing about 131 species at present in the world. However, the genus Xenylla of Asia has been very poorly investigated; in Japan, four species, X. acauda Gisin, X. arenosa Uchida & Tamura, X. brevispina Kinoshita, and X. longicauda Folsom, were recorded, only three species, X. boerneri Axelson, X. changlingensis Wu and Yin, and X. changchunensis Wu and Yin, was known to occur in China. In Korea, the first recognizable species of the genus Xenylla was only one listed by Lee in 1973: Xenylla brevispina Kinoshita, 1916. Later Park et al (2005) added four new species, X. convexopyga, X. dotata, X. longistriata, and X. marina, which collected from litter of coniferous and broad-leaved trees, soil layer of a deciduous forest and dry accumulated organic matter on the margins of saline water. One new species of the genus Xenylla that were found from Korea is found. The new species characterized by labral setae arrangement and tiny anal spines. The present species resembles X. dotata in the arrangement of dorsal and ventral setae. But it is easily distinguished from X. dotata by the length ratio of furca, morphology of mandible, the shape of dorsal setae upon fourth antennal segment, and the length of anal spine. As result of this study, Korean faunal list of Xenylla adds up to 6 species.