Folia Historico-Naturalia Musei Matraensis - A Mátra Múzeum Természetrajzi Közleményei 6. (1980)

Kiss, O.: A Mátra hegység Ilona-völgyének Trichopterai

Fig. 5. Locality I

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. 1. large stones, 2. small stones and gravel, 3. sand, 4. slime, 5. detritus, 6. micro-waterfall. Locality I

6 at the bridge (Fig. 7.): The stream bed is widening out to 3 m, with slow water flow, large stones on its bottom and detritus accumulations on its edges. The depth of the water ranges between 15—20 cm. The banks are lined with Petasitetum hybridi DOST., it is a half shaded plot. The water temperature was 15.6 °C on 18th July, 1977 and 8.9 °C on 2nd October 1977. The species found there are: Bhyacophila obliterate/, MAC LACHLAN, P oly centr opus jlavomaculatus PICTET, Agapetus comatus PICTET, Plectrocnemia conspersa CURTIS, H y dropsy che angustipennis CURTIS, H. instabilis CURTIS, Ecdysopteryx madida MAC LACHLAN, Odontocerum albicorne SCOPOLI, Halesus digitatus SCHRANK, Potamophylax latipennis CURTIS, Stenophylax permistus MAC LACHLAN, Sericostoma personatum PENCE, Silo pallipes FABR. and 8. nigricornis PICTET; this latter one had not been collected in the Ilona Valley before. 121