The family Ichneumonidae belongs to the order Hymenoptera, class Insecta, and includes over 25,000 valid species in 47 subfamilies worldwide. The family occurs worldwide, with more species in cool moist climates than in warm dry ones. Ichneumonids are parasitoids of immature holometabolous insects or Chelicerata (Araneae and Pseudoscorpionida eggs adult Araneae). Symphyta and Lepidoptera, which are agricultural and forestry pests are the most common hosts. Therefore, they are one of most important control agents of the pest populations. This family is known as a monophyletic group with the family Braconidae.
The inventory of the Hymenoptera fauna of the Korean peninsula was started from the end of the last century (1887) by O. Radoszkowski. A comprehensive historical review of the faunal study of Hymenoptera has been prepared by Kim (1963) who recorded 921 species, 382 genera in 76 families from the Korean peninsula. Among them, 271 species of Ichneumonidae had been recorded until 1970 from South Korea. Since then, taxonomic study of Ichneumonidae has developed steadily over the past 30 years by several Korean taxonomists. Recently, the frequency of collaboration with foreign specialists has also increased. The current total of South Korean Ichneumonidae is 921 species in 302 genera of 29 subfamilies. It is hoped that more collaborative work in the future will help describe the country’s rich diversity.