S. Mahunka szerk.: Folia Entomologica Hungarica 59. (Budapest, 1998)

New data to the caddisfy (.Trichoptera) fauna of Hungary, IV. 77 Bükk Mts (Nógrádi 1989a). Its second occurrence can be a great surpise: we captured it in NW Hungary, Szigetköz: Halászi, Mosoni-Duna, July 22-23, 1992, 1 d (light trap). We must suppose that specimens in preimaginal stage had been swept away by the running water from an alpine tributary of the Danube, then they hatched in the lower reaches of water system, e.g. in the Danube. It is very probable that similar cases sometimes occur (see Nógrádi, Uherkovich 1996). AN INTERESTING HABITAT OF CADDISFLIES The habitat of Heiicopsyche bacescui Orgh. et Bots, is rather characteristic and the caddisfly communities living in it have a peculiar composition. The region of Inner Somogy ("Belső-Somogy") is covered by a sand layer having light waved surface, its thickness may exceed 15-20 meters from place to place. The river Dráva has steep and high banks. Most of these banks are abandoned by the river, so at their foot a plain (the old inundation area) lays. Along the foot a long row of springs well up between Bélavár and Ortilos. The water of these springs usually does not reach the river but it leaks in the sand or pebble. In many places small moors formed, and they are fed by these spring, in alder grove. Although the water output of these springs fluctuates, the moors do not dry up in summer or in other dry periods. As the moors situated along a southwestern slopes, their mesoclimate is warmer than that of the environs. The most typical springmoors lay at Somogyudvarhely (we visited similar places also at Bélavár, Berzence and Zákány). In June 1997 we were trying to collect caddisflies here. First, to our great surprise, we had collected two beraeid species (Beraea pullata Curt, and Ernodes articularis Pict.), further some specimens of Crunoecia irrorata Curt. All of these three species are rarities in the southern part of Transdanubia. Later, returning there, we took here also a good set of Heiicopsyche bacescui Orgh. et Bots. Once a small portable light trap was operated in the middle of a springmoor: it captured some Crunoecia and Plectrocnemia conspersa Curt. The caddisfly community of this type of habitat consists of these five species so far. We have to notice that all members of this community were rarity in most cases in southern and other parts of Hungary, and, as it has been presented above, this is the only known Hungarian locality of Heiicopsyche bacescui Org. et Bots. Acknowledgement - I express my sincere thanks to Dr. L. Abraham, Dr. P. Gyulai, Mr. V. G. Papp and Dr. A. Uherkovich for the collected materials which they passed onto me for elaboration. REFERENCES Boto§äneanu, L., Malicky, H. (1978): Trichoptera. - In: Hies, J.: Limnofauna Europaea, pp. 333-359. Gustav Fischer Verlag, Stuttgart - New York. Ciubuc, C. (1993): Checklist of Romanian Trichoptera (Insecta). - Travaux du Muséum d'Histoire naturelle Grigore Antipa 33: 11-147. Kiss, O. (1983): A study of the Trichoptera of the Szalajka Valley near Szilvásvárad as indicated by light trap material. - Folia Hist.-nat. Mus. Matrensis (Gyöngyös) 8 (1982-1983): 97-106.