S. Mahunka szerk.: Folia Entomologica Hungarica 60. (Budapest, 1999)

In Hungary both species seem to be associated with rivers of the lower hill-lands and the marginal regions of the lowlands, where water is running swiftly. Co-existence of the two species in the same river (often on the same piece of wood) was observed in the Rába river (several localities), in the upper reaches of the Tisza (Tarpa), in the Bársonyos (Bocs), in the Bódva (Edelény) and in the Lapines (Szentgotthárd). Their presence indicates that other species of faunistical interest can be looked for (cf. Kovács et. al. 1998). For instance, the water bug Aphelocheirus aestivalis (Fabricius, 1803) (Heteroptera: Aphelocheiridae) was found along with them several times (marked with + * in the above list of records): 21 of the 36 collectings of P. acuminatus (58.3%) and 36 of the 42 collectings of M quadrituberculatus (85.7%). Further research of the water bodies of Hungary will certainly result in a more exact picture of the distribution of these remarkable species. Waters where these species were found in the 1990s deserve special attention in view of nature conservation. Acknowledgements — Thanks are due to Dr. Béla Csányi and Péter Juhász for making available their collectings and for the opportunity to publish their data. Figs 1-2 were produced by János Pál. REFERENCES Gerber, J. (1993): Über den Wiederfund des verschollenen Wasserkäfers Potamophylus acuminatus (Fabricius) (Col., Elmidae) und Beobachtungen zu seiner Bionomie. —

Lauterbornia 13: 89-99. Gidó, Zs. and Szél, Gy. (1998): Adatok a Duna-Dráva Nemzeti Park Dráva menti részének vízibogár (Coleoptera: Hydradephaga, Palpicornia, Dryopidae, Elmidae) faunájáról. (Data to the aquatic beetle fauna (Coleoptera: Hydradephaga, Palpicornia, Dryopidae, Elmidae) of Dráva region in Duna-Dráva National Park, South Hungary.) — Dunántúli Dolg. Term. tud. Sorozat 9: 189-202. Graf, W. (1997): A new record of the perlid stonefly Agnetina elegantula (Klapálek, 1905) in Europe. — In: Landolt, P. and Sartori, M. (eds): Ephemeroptera and Plecoptera: BiologyEcology-Systematics. Maron+Tinguely and Lâchât SA, CH-Fribourg, pp. 205-208. Jäch, M. (1992): 42.a Familie: Elmidae. — In: Lohse, G. A. and Lucht, W. H. (eds.): Die Käfer Mitteleuropas, 2. Supplementband mit Katalogteil. Goecke and Evers, Krefeld, pp. 69-82. Kaszab, Z. (1990): Bogarak (Coleoptera) rendje. — In: Rakonczay, Z. (ed.): Vörös Könyv. A Magyarországon kipusztult és veszélyeztetett növény- és állatfajok. 2. kiadás. [Red Data Book. The plant and animal species extinct or endangered in Hungary. Second edition.] Akadémiai Kiadó, Budapest, pp. 245-258. Kodada, J. (1991): Potamophilus acuminatus (F.) - not extinct in Central Europe! (Coleoptera: Elmidae).— Koleopt. Rdsch. 61: 157-158. Kodada, J. and Merkl, O. (1996): Dryopoidea (Coleoptera) from the Bükk National Park. — In: Mahunka, S. (ed.): The Fauna of the Bükk National Park, 2. Hungarian Natural History Museum, Budapest, pp. 281-283. Kovács, T., Ambrus, A., Bánkuti, K. and Juhász, P. (1998): New Hungarian mayfly (Ephemeroptera) species arising from collectings of larvae. —Miscnea zool. hung. 12: 55-60. Kovács, T. and Hegyessy, G. (1993): Új és ritka bogarak (Coleoptera) Magyarországról. (New and rare beetles (Coleoptera) from Hungary.) — Fol. Hist.-nat. Mus. Matr. 18: 75-79. Merkl, O. (1996): The species of 27 beetle families (Coleoptera) from Őrség (Western Hungary). — In: Vig, K. (ed.): Natural History of Őrség Landscape Conservation Area II. Savaria Múzeum, Szombathely, pp. 103-139. Merkl, O. and Kovács, T. (1997): Nemzeti Biodiverzitás-monitorozó rendszer VI. Bogarak. [National Biodiversity Monitoring System VI. Beetles.] — Hungarian Natural History Museum, Budapest, 44 pp.