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.

Abstract
 INTRODUCTION
 MATERIALS AND METHODS
  Collecting and imaging
  Morphology
 TAXONOMIC ACCOUNT
 DISCUSSION
 ACKNOWLEDGEMENTS
 REFERENCES

• Yun-Sik Lee(Ojeong Eco-Resilience Institute, Korea University)
• Kijong Cho(Department of Environmental Science and Ecological Engineering, Korea University)
• Kyung-Hwa Park(Department of Biology Education, Chonbuk National University) Corresponding author