Abstract
Three of chalcidoid wasps are newly reported as pupal parasitoids of the fallwebworm to Korea: Tetrastichus septentrionalis Yang and Chouioia cunea Yang (Hymenoptera: Chalcidoidea: Eulophidae); Dirhinus sp. (near D. anthracia) (Hymenoptera: Chalcidoidea: Chalcididae). Two eulophids were first described as pupal parasitoids of the fallwebworm from China and have been used as biological control agents against the moth for many years. Both species display distinctive sexual dimorphism in male. Apart from the color of legs and antennae, Dirhinus sp. agrees well with the description of D. anthracia. It remains as Dirhinus sp. at present as it requires further comparative study on morphology between our parasitoid and D. anthracia.
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