S. Mahunka szerk.: Folia Entomologica Hungarica 29/1. (Budapest, 1976)

place we would like to express our most sincere gratitude to both of them for their unfailing and always ready help. We should further like to express our thanks to the sponsoring institutions, the Hungarian Academy of Sciences, the Ministry of Culture and Education, the Hungarian Natural History Museum and the Foreign Relations of the Korean Academy of Sciences. Several times we were guests of the Hungarian Embassy at Pyongyan whose staff also helped us extensively for which we would again like to thank them all. We have spent 29 days in Korea, of which 12 days have been taken up by cultural and various other programmes, 6 days for inland travelling and the remaining 11 days have been consumed by zoological collecting. These 11 days have been made use of in three different localities: 1. in the environs of the Chinese-Korean border at Sam-zi-yan and the Pektusan 2 days; 2. Pyongyan and environs 4 days; 3. Diamond Mountains in the south-eastern part of the country 5 days. Interpreting our stay in hours, we spent a total of 700 hours in Korea. Of which we spent 50 hours in daily collecting and a further 51 hours in night collecting with lamps (a total of 101 hours collecting, 14,5 % of our time!). This is why we decided to make reference to the actual number of hours spent at one particular locality (see later). Fortunately, we were lucky enough to spend comparatively a lot of time in night collecting with lamps, since this activity depended on us when we wished to terminate it and we especially capacitated ourselves when at Sam-zi-yan and at the Diamond Mountains. We were also quite successful to spend the late hours of the night and even the early of hours of in the window of our hotel in Pyongyan and Hyesan. As far as lamp collecting is concerned we shall some back to our experiences later. Our main objective was to collect as many and as varied as possible of the animals concerned. Obviously, however, our two special fields of interest, i.e. Hymenoptera (J. PAPP) and Lepidoptera (A. VOJNITS), enjoyed our privilege, though the other groups of Insecta and other Arthropods have not been neglected, as it is clearly demonstrated by the list of animals at the end of this contribution. Owing to the nature of our special groups we were mostly engaged in singling, sweeping by nets and lamping, these were our principal methods of collectings. Besides, naturally, we turned over stones, beat the vegetation, pealed off barks and set up soil traps using salted beer. Among the so-called semi-automatic traps we used the Malaise-trap, and also extracted animals from soil, litter, lichen and moss by the help of the Berlese apparatus. Our daily collectings, mostly in the environs of Pyongyan, have quite frequently been washed away by torrential rainfalls. In an average 28-32 °C with several storms a day collecting was difficult, though owing to the high temperature the vegetation quickly dried and in 1-2-3 hours we were at it again and were even able to use our sweeping nets. Of course, we expected regular rains since we were in the monsoon, this is why we chose this particular time of the year, so when rain stopped and the sun began to shine we continued our beat in spite of the extremely stifling heat with a relative humidity content of 80-90 %. Good results were obtained by singling and sweeping Hymenoptera. Singling yielded mainly Aculeata and large-sized Symphyta, while sweeping secured us mainly Terebrantia and small-sized Symphyta. In several places mostly woods and gallery forests (environs of Pyongyan and in the Diamond