S. Mahunka szerk.: Folia Entomologica Hungarica 49. (Budapest, 1988)

Mt. Myohyangsan, our northernmost collecting site, is a large, forested mountain with about 2000 m highest elevation. Collectings were carried out in the northwestern part of the mountain, in river and stream valleys and medium ridge forests. Forests are very rich in both deciduous and evergreen tree species, the shrub stratum is reacher in the open skirts, whilst the shallow rocky soil shows quite sparse herbaceous vegetation. Around Haeju, we were able to work on two different forest areas. First to mention is Mt. Suyong-san, in the lower region of which pine plantations and bushy clearings, going higher up rich deciduous forests, mainly rocky forests were found, underwood of this latter being more diversified, especially at the edges and clearings. The other place is Mt. Yangchisan, strongly bushy at the foothill, sparser at higher altitudes, with rocky shrub forests, rock-streams and clearings. Both the shallow soil and the low vegetation were very dry here. On the high ridges of Mt. Kumgang-san, the deciduous forests with pine trees have almost no herbaceous undergrowth. The soil is under a strong erosive process, and was quite wet everywhere, in spite of the few precipitation experienced. Around the Lake Samil-po (po= lake) there are pine and bamboo plantations, however, the original oak forests' are also traceable to a certain degree. The natural zonation of the vegetation remained only on a few small sandy banks around the lake. Evaluation of the collected material is under course yet, but some comments can be made already. In the Lepidoptera material, species richness of the family Noctuidae is the most striking: 107 species have been collected during the three weeks. The number of species in the Microlepidoptera families was very low, only some Tortricid species were frequently encountered. In the superfamily Papilionidea only some large, overwintering Nymphalids and a Colias species (i. e. erate

) appeared, but it is to mention, that the species of the Geometrids of the late autumn period were not or only in very small number collected. Species number of Bombycoidea and Thyatiridae corresponds to the high numbers of this zoogeographical subregion, however, with small individual numbers only. Referring to the species composition of the Noctuidae, it is worth to mention the presence (in high numbers) of the Far Eastern arboreal species, the majority of which is new to the fauna of Korea, - and some of them was described only in the past 15 years, such as Meganephria cinerea

. Agrochola albimacula, Xanthia tigrina, etc. The autumnal forest fauna contained mainly the non-overwintering species, the fauna of the late autumn was very weakly represented. In the case of Lithophane consocia grisea, we even had the opportunity to observe the beginning of its swarming in the Mt. Kumgang-san, between 21 and 24 of October. On the other hand, species number (14) of the subfamily Plusiinae was rather high. Regarding the newly hatched moths and the evenly high specimen number, the late autumnal second generation is obvious in this subfamily. As far as the millipedes and centipedes are concerned, it can be stated, that our collection exceeds both in quantity and number of species the material collected by the previous expeditions of the HNHM in Korea. Evaluation of these groups will form the basis of a separate paper. During our three-week stay in North Korea we managed to collect three species of amphibians and three species of reptiles, 27 specimens altogether. The Korean herptile fauna comprises 33 species. The species names of the collected animals are mentioned in the "List of localities" part of this paper. Acknowledgements We would like to express our sincere thanks to the Academies of the two countries, to the Zoological Institute in Pyongyang, and to our dear colleagues: Mr. HONG RYONG-TAE and Mr. KANG DAE-RYONG for their invaluable help in organizing our collectings and everything during our stay in the D. P. R. Korea. Abbreviations : Plat. = Platyhelminthes Iso. = Isopoda Nem. = Nemathelminthes Dipl. = Diplopoda Ann. = Annelida Sym. = Symphyla Moll. = Mollusca Chil. = Chilopoda Dec. = Decapoda Coll. = Collembola