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

works, the checklist of the Korean Lepidoptera, annotated with the main distribution data can be published and a scientific reference collection in the CIS can also be built up. Within the framework of the agreement mentioned above, the expedition was carried out in the second part of the summer, (in the period of 13-28th of August, 1992). We planned to work in the north-eastern and southern mountainous parts of the Republic of Korea, including the big southern island Cheju-do. Our program was tight, in fact, but, as a result of the precise organisation of Dr. Park and his team, it was entirely fulfilled. After a long flight from Budapest to Seoul via Zurich - Bombay - Hongkong we arrived to Chuncheon ("Chunch'on") at the late night in 14th of August. The next day, after a short discussion and a quick survey of the Noctuidae and Geometridae collections of the Center of Insect Systematics, we went to the first night collecting in the vicinity of Chuncheon. Our journey in the countryside was started on the second day, accompanied by at least two, often three or four Korean colleagues. The following three days were spent in the NE edge of the country, in the Mts Seolak-san ("Sor'ak Mts") which is the direct, southern continuation of the North Korean Diamond Mts ("Mts Kumgang-san") with a similar but less rocky and more forested landscape. Turning to the south and crossing Suweon ("Suw'on") and Suncheon ("Sunch'on") we visited the rather high (about 1700-1800 m) mountain system along the southern edge of the peninsula and collected in two days in the Mts Paekun-san. Finally, we spent four days in the large volcanic island Cheju-do and collected at nights in different zones of the Mt. Halla-san ("Hanra-san"). We worked in every place with one or two white screens illuminated with 125 W mercury vapour lamps supplied from a Honda generator, and a portable light-trap with 6 W UV-tube was also used in exception of the first collecting night. The daytime collectings were usually very scarce, as the time was strongly delimited by the treatment of the previously collected material and because of the long distances between the localities. The collecting sites were selected so that the different collecting units - the screen(s) and the light trap - were placed in different habitats in every night for a better survey of the fauna of the locality. The screen(s) usually placed to the most open part of the habitat since the light trap was tried to put inside the forest or close to the stream in a deep valley. Therefore the species composition of the material collected by the two different methods is often quite different and it was significantly richer in case of the collecting in open habitats almost in every night. Although the period of the expedition was carried out after the summer monsoon, the collectings often were disturbed by heavy rains and/or strong, stormy wind. In spite of these circumstances, the results were not bad, sometimes distinctly good; the largest flights were in the medium high altitudes of the Seolak-san and on the island Cheju-do. This latter area is really very interesting as the medium-high and high elevations of the big volcano is covered with a very rich, "temperate rain-forest" since the lower ones are markedly subtropical, with a wider bushy intermediate zone. As the volcano itself is rather high (the highest peak is 1950 m), its undisturbed forests very probably deserve faunagenetically important - and possibly some endemic - elements of the monsoonic fauna, especially of the late autumnal and the early spring aspects, the investigation of which would be highly important.