Subfamily Eumeninae, also known as the potter wasp, constructs mud cells and lays a single egg in each cell. The adult female potter wasp hunts lepidopteran larvae and paralyzes them then brings them back to the nest for its offspring. This research is focused on the behavioral study of Euodynerus nipanicus nipanicus. The environmental characteristics, nesting behavior, predatory behavior, and parasitoids are represented. The rate of occupancy of the nest holes was 70.83%, with 5.4 cells per nest hole. The average length of cells was 12.11mm long, and they were filled with 4.23 larvae respectively. Also, the time period from egg to adult of the wasp was 36.27 days, on average. By analyzing the prey hunted and stored inside the nest cell, 4 different species in minimum were found to be hunted. Additionally, hymenopteran parasitoid and lepidopteran kleptoparasite are newly discovered. The research suggests that providing nest traps to potter wasps can increase the natural biological control held by the potter wasp species and could support the conservation of the potter wasps.

A total of 12 genera, 37 species in the subfamily Eumeninae was recognized from the insect collection of several universities and institute in Korea (Seoul National University, Kangwon National University, National institute of Agricultural Science & Tech.). In 2007, 13 species in 9 genera were collected throughout the country by sweeping net and bamboo nest traps. Among them, Anterhynchium flavomarginatum koreanum (86 specimens), Discoelius zonalis (29 specimens), and Euodynerus dantici (20 specimens) were most dominant. One species (Stenodynerus sp.) was confirmed as new to science. Using the bamboo nest traps, 7 species of Eumenid wasps were collected and the larvae of Gelechids and Pyralids were confirmed as the prey of Discoelius zonalis and Anterhynchium flavomarginatum koreanum, respectively.

Korean Symmorphus species are reviewed taxonomically. We have confirmed eleven species including six newly recorded ones from the Korean Peninsula: Symmorphus ambotretus, S. angustatus, S. apiciornatus, S. bifasciatus, S. carinatus, S. decens, S. foveolatus, S. lucens, S. mizuhonis, S. murarius, S. tsushimanus. A key, diagnosis, remark and illustrations to all the known species are provided.