Dr. Tóth Sándor (szerk.): A Bakonyi Természettudományi Múzeum Közleményei 7. (Zirc, 1988)

DR. UHERKOVICH ÁKOS – DR. NÓGRÁDI SÁRA: The Trichoptera of the Bakony mountains and environs II. (Hungary)

Hydroptila vectis CURT. The only reference is in Fauna Regni Hungáriáé to this species C

MOCSÁRY 1900D. During 87 years no specimen was captured in Hungary. Two females came to light along the Viszló Stream at Zalahaláp. Polycentropus irroratus CURT. It is,a rare species, collected in Mecsek Mountains at Vékény, at Magyarszombatfa C

NÓGRÁDI 1987), in the Zemplén Mountains COLÁH 1967) and around Veresegyház Ccoll. HNHM Budapest). It was taken twice along the Meleg-víz CFig. 5). Holocentropus dubius RAMB. Until recently 6 localities became to be known C

NÓGRÁDI-UHERKOVICH 1988b, coll. HNHM Budapest). One of them is along river Marcal, at Nemeskeresztúr CFig. 6). Fauna composition of two biotops In the past years the composition of Trichoptera fauna of several streams was examined and published CNOGRADI 1987, 1989, NÓGRÁDI-UHERKOVICH 1988a). The mountainous streams have several species characteristic only of these fast running and cold ones. The frequent species of the stream of Pásztor spring Cin Eastern Mecsek Mountains) are Rhyacophila fasciata HAG., Wormaldia occipitalis PICT., Tinodes unicolor PICT-, Stenophylax meridiorientalis MAL., Potamophylax nigricornis PICT., Chaetopteryx major McL.

, Chaetopteryx schmidi mecsekensis NÓGRÁDI etc. These species do not occur in the streams of lowland and low, hilly regions. At Kisdobssa, along the Gyöngyös stream Hydropsyche species Cmostly H. saxonica McL., H. modesta NAVÁS, H. contubernalis McL., H. ornatula McL.), Ceraclea dissimilis STEPH.

, Neureclipsis bimaculata L. proved to be dominant species. The characteristic feature of the fauna of Szőce stream CWest Hungary) Í3 the diversity: 84 species were captured there CKisdobsza: 64 species). The dominant species are Agapetus fuscipes CURT., Chaetopteryx fusca BRAU., Ch. rugulosa KOL., Rhadicoleptus alpestris KOL., Lithax obscurus HAG., Notidobia ciliaris L.

, etc. The composition of the fauna of Meleg-víz and upper branches of river Marcal is different from other types of waters. We drew up the summarized list of these water courses CTable 1, 2 J. The composition and quantity of Trichoptera fauna of Meleg-víz is the most unusual have been found until now. One third of the material is composed by Oxyethira falcata MORTON. An other hydroptilid, Hydroptila simulans MOS. reaches 10 p. c. The number of specimens of Psychomyia pusilla F. is strikingly high, it almost reaches 30 p. c. These three species mount up to more than 72 p. c. together. The Hydropsyche females reach 8, Ecnomus tenellus RAMB. almost 10 p. c. The rest 10 p. c. is divided amongst the other 33 species, their percentage is between 0.03 and 1.46. This strange composition is due to the practically permanent water-temperature and its quick run. After the elaboration of light trap material derived from here we will get more exact data about the quantitative relations. The most frequent species of river Marcal is also a hydroptilid, Hydroptila sparsa CURT. Its dominancy is over 36 P- 0. Another hydroptilid, Orthotrichia angustella McL. reach 16 p. c. These two species - together with Oecetis ochracea CURT, count 70 p. c. It is interesting that Colpotaulius incisus CURT., Athripsodes cinereus CURT, and Mystacides nigra L. belong to the more frequent species, too

. The water temperature of the Marcal is not permanent, but the fluctuation is relatively moderate along the examined branches. Summary The number of caddisfly species known from the Bakony Mountains and its environs increased to 100. The focus of our examinations was the upper part of the catchment area of river Marcal, Here the composition of caddisfly fauna was very unusual because of permanent water temperature C

Meleg-víz) or of the moderate temperature-fluctuation Criver Marcal). If we had the possibility to continue to examine this water system in the future, we should certainly get further interesting results. Anyway elaboration of considerable light-trap material of the field is pressing and urgent

.