S. Mahunka szerk.: Folia Entomologica Hungarica 56. (Budapest, 1995)

Some data on the spider fauna of reeds in Hungary. I. Interesting faunistic data from the reeds of Lake Balaton Cs. Szinetár Some data on the spider fauna of reeds in Hungary I. Interesting faunistic data from the reeds of Lake Balaton - The author examined the spider fauna of reeds standing in the flooded area of Lake Balaton. The following rare species have been found: Tetragnatha shoshone Levi, 1981, Teiragnatha reimoseri (Rosea, 1939), Glyphesis taoplesius Wunderlich, 1969. Mysmena jobi (Kraus, 1957). INTRODUCTION Though the spider fauna of reeds in Hungary has already been studied by a number of researchers, further studies seem to be reasonable and timely from many aspects. A survey of earlier Hungarian studies, as well as of the spiders most typical of reeds have been recently published (Szinetár 1993). A number of detailed studies appeared about the spiders living in the reeds of Lake Balaton. (Kolosváry 1928a, 1928&, 1930, 1931, Balogh 1933, Loksa et al. 1990-1993). My studies adjoining to a complex research project into the fauna of homeland reeds were started in 1993 (OTKA 3160). In this short paper I give an account of the faunistic studies that I carried out in a permanently flooded reed area of Lake Balaton. My endeavour was greatly motivated and promoted by the outstanding report by Uhl et al. (1992). STUDY AREA AND METHODS My collecting work was done in the vicinity of Balatongyörök, in the North-western region of Lake Balaton (Map 1). In this part of the lake the reed standing in the water has considerably decayed during the last 15 years. A considerable part of the reed belt is on dry land today, the growing in the permanently flooded area occupies only a narrow stretch of a few metres wide. Two differing methods were applied in the course of collection. A certain amount of the spiders was caught in pitfall traps placed along the water in the offshore bar built of vegetation debris by the waves, which only allow the operation of the traps on a few days free from wind. The traps functioned from 31 July to 8 August, 1993. They were filled with a 10% acetic acid solution. (Table 1, sample I). The other part of the sample was caught by manual collection by way of thoroughly examining living reed-stalks either during daytime (Table 1, sample IV) or at night by