Uherkovich Ákos: A Villányi-hegység botanikai és zoológiai alapfelmérése (Dunántúli Dolgozatok Természettudományi Sorozat 10., 2000)

Nógrádi, Sára: Caddisflies (Trichoptera) from the Villány Hills, South Hungary Collection in an area without water courses. - Tegzesek (Trichoptera) a Villányi-hegységből. Gyűjtések egy vízfolyások nélküi területen.

292 DUNÁNTÚLI DOLGOZATOK TERMÉSZETTUDOMÁNYI SOROZAT 10 (2000) 20. 6. 1976 (U): 1 S, 10. 7. 1993 (U): 2 SS 1 ?; 10. 6. harsány, Szársomlyó, 6. 7. 1999 (U): 3 $$, 4. 6. 2000 1999 (U): 2c?c? 5 $$; 6. 7. 1999 (U): 2 (J<J 2 $9, 24. (U): 40 $$. 5. 2000 (U): 4 c?6\ 4. 6. 2000 (U): 5 ÇÇ, 22. 7. 2000 Setodes punctatus (Fabricius, 1793) - Bisse, (Á): 2 SS 2 $, 17. 8. 2000. (U): 1 $; Siklós, Csukma- Tenkes-hegy, 6. 7. 1999 (Á): 1 S\ 21. 7. 1999 (Á): hegy, 7. 8. 1999 (Á): 1 (?; Siklós, Göntér (lt): 30. 6. 2<J<J; Csarnóta, Nagy-hegy, 22. 7. 1999 (Á): 1 Ç; 1983 1 $; Villánykövesd, régi vasút, 25. 7. 2000 (Á): 2 Diósviszló, Csikorgó-dülö, 11.6. 2000 (N, U): 4 <J<J 8 <ĴcJ 2 $$. $$; Kisharsány, Hársos, 21. 6. 2000 (N, U): 2 <Jó* 2 Oerefü ochracea (Curtis, 1825) - Biss, Tenkes- $$; Kistótfalu, Csicsó-hegy, 20. 6. 2000 (U): 7 SS 3 hegy, 25. 7. 2000 (Á): 1 c?; Csamóta, Nagy-hegy, 22. 7. $$; Máriagyüd, Tenkes-hegy, 2 $Сь Nagyharsány, 1999 (Á): 2$$; Diósviszló, Csikorgó-dűlő, 11. 6. Szársomlyó, 6. 7. 1999 (U): 22% SS 200$$; 20. 7. 2000 (N, U): 1 S\ Nagyharsány, Szársomlyó, 14. 9. 1999 (Á): 59 SS 8 $$; 14. 9. 1999 (Á): 1 $, 22. 6. 1999 (Á): 1 S, 29. 4. 2000 (Á): 1 ó* 1 ?; Szava, Hegy- 2000 (U): 2 SS 1 $; Siklós, Göntér (lt): 30. 6. 1983 adó-patak, 11.5. 2000 (N, U): 1 $; Túrony, 22.7. 1999 1 S; Vokány, Trinitás-erdő, 11.7. 1999 (N, U): 3 SS (Áy.iS. з$$. Leptocerus tineiformis Curtis, 1834 - Diósviszló, Adicella syriaca Ulmer, 1907 - Kistótfalu, CsicsóCsikorgó-dülő, 11.6. 2000 (N, U): 1 <? 18 $$; Kistót- hegy, 20.6. 2000 (U): 1 Sfalu, Csicsó-hegy, 20. 6. 2000 (U): 2 SS 3 $$; NagyDiscussion The adults of most caddisfly species are incapable of flying considerable distance from the water where they develope. For that very reason the collections are the most fruitful close to waters. On the contrary, members of some groups of caddisflies can cover long distances during their lives, when they fly to an advantageous place - a wet forest in the hilly regions or caves - to aestivate. In the Hungarian fauna the species of the genera Limnephilus, Grammotaulius, Glyphotaelius, Stenophylax, Micropterna (Limnephilidae), Phryganea, Agrypnia and Trichostegia (Phryganeidae) exhibit an interrupted activity: after hatching - usually from May to beginning of July - they migrate into forests or caves to spend there some weeks or months. From August to October - sometimes depending of the actual weather conditions - they migrate back to their egg-laying places. During the period of their summer diapause they do not stay in the lower lands, but mostly in the hilly regions where sometimes they are on wing. Therefore, the collected materials consist of such type of species far from waters see Table 2 - in which we compare the caddisflies of Villány Hills with those of the southern slopes of Mecsek Mountains. In this table the caddisflies that were collected along the small brooks at the northern foot of Villány Hills are not enumerated, as they were found along their habitats. Another type of swarming is a passive displacement with the help of air currents. Many species, having little capacity to fly long distance, take advantage of weather conditions and they can be swept across by air currents to areas without water courses. Mostly many leptocerids and sometimes species of other families can be collected far from their place of development as a consequence in this reason. On 6

th July 1999 428 adults of Setodes punctatus F. were collected on Szársomlyó Hill where the nearest water course (Karasica stream) runs in a distance of cca. 3...4 km. A similar phenomenon was observed in the case of Brachycentrus subnubilus Curt., when we collected several adults cca. 10 km far from the river Dráva, the actual breeding site. The swarming of this latter species is related with a very advantageous weather situation: this long distance drift can be observed only in pre-frontal situation, usually at falling atmospheric pressure. (The swarming of other insests are also related with similar situations, see UHERKOVICH 1976.)