S. Mahunka szerk.: Folia Entomologica Hungarica 53. (Budapest, 1992)

In our daytime collectings the usual methods were used, as the singling of Lepidoptera, Trichoptera, Neuroptera and Odonata by net, additional singlings of other arthropod groups from flowering plants, tree trunks, under stones and barks and sifting of forest litter. The weather conditions were usually not the most suitable for the night collectings: although the days were rather warm and sunny, many of the evenings and nights were cool and windy. On the contrary of the relatively cold May, the early spring aspect even in the mountainous ranges was represented by some very few taxa and specimens (e.g. Lithophane plumbealis, Orthosia carnipennis, Clavipalpula aurariae). So we arrived to the northern regions just into the "gap" between the early spring (overwintering and/or very early emerging Noctuidae and Geometridae) and the late spring-early summer aspects. This transitional period can be characterized by the dominance of Larentiinae geometrids and numerous "bombycoids" as Lymantriidae, Notodontidae, Thyatiridae, etc.), since the Microlepidoptera and Noctuidae appear scarcely and the species numbers are rather low. In the mountains Myohyang-san and Kumgang-san we had the accomodation in the same hotels where the previous expeditions stayed, therefore the visited places were along those routes and pathways which were described in the previous reports in the expedition series. The only - important - difference was that the sites of the lamps and the trap were often far from the hotel, thus, new, less disturbed habitats could be investigated. Our expedition was the first which could work at the north-eastern border of the country, in the vicinity of the city Chondjin. The city is placed close to the border of Russia (the former Soviet Union) along the shore of the Japanese Sea. The city itself lies on the lowland and the relatively less cultivated areas start about twenty-thirty kilometres NW and W from the city, at the edges of the high mountain massif. We had the opportunity to collect in humid brook valleys and in moderately wet deciduous mixed forests where the composition of the fauna was really interesting and many species were found only in these valleys during our expedition (e.g. Mirina christophi, Calliergis ramosula, Feralia sauberi, Conisania suavis, Heraema mandshurica, etc.). Acknowledgements. We would like to express our thanks to the Academies of the two countries and the staff of the Zoological Institute in Pyongyang. Our special thanks to the colleagues Mrs. Che He Goom and Mr. Kim Chong II for their very important help in every respect during our stay in Korea. Abbreviations Chil = Chilopoda Dipl = Diplopoda Lepism = Lepismatidea Coll = Collembola Eph = Ephemeroptera Isop = Isopoda De C PI Ne Tr L Dermaptera Coleoptera Plecoptera Neuroptera Trichoptera Lepidoptera Hymenoptera Diptera He = Heteroptera Ho = Homoptera Is = Isoptera Hy Di