S. Mahunka szerk.: Folia Entomologica Hungarica 58. (Budapest, 1997)

probably even after, e.g., in Kaliszewski 1993) they might have been identified as Tarsonemus. Moreover, many species causing serious diagnostic difficulties to taxonomists have also appeared in the studied material. They sometimes can be identified with certainty only in the presence of males, which usually posses more obvious characteristics, (e.g., inner femoral flange on leg IV). One good example of such a difficulty is Dendroptus willmanni Schaarschmidt that had been identified in the present material. The males of this species have very characteristic small, but fairly distinct rounded inner flanges on femora IV and exceptionally prominent terminal IV claws (as aptly expressed in a work of Schaarschmidt 1959), while both sexes (among other features) have their setae 3a apparently twice longer than 2a and 3b. On the contrary, the species apparently identical with one called "Tarsonemus willmanni" by Suski (1967) (here: Dendroptus sp. 1) have broadly semicircular inner flanges on femora IV in males, and setae 2a, 3a and 3b of equal lengths. Apart from that, it is possible that species provisionally identified here as spp. 1 through 7 were indeed inadequately described by earlier authors dealing with plant inhabiting tarsonemids. As the systematical problems were not in the scope of present study, it seems to be necessary to revise acquired material in a separate paper (present authors, in prep.) It is tempting to analyse relationships between tarsonemid mites and other (i.e., noneriophyoid) microarthropods dwelling in the vegetation habitats. The nature of the association is most likely indirect, i.e., relying on effects induced onto the host plant and associated fungi by other microarthropod components of the subsystem. Acknowledgements - Special thanks are expressed to Dr. Sándor Mahunka for his precious advice and considerations. The study was supported by a Polish Committee of Scientific Research grant (KBN No. 6 P204 02907) and Hungarian Ministry of Agriculture. REFERENCES Alford, D. V. (1973): A new species of tarsonemid mite found in association with Eriophyes gallarumtiliae (Turpin) (Acarina: Prostigmata) on lime. Entomologists Monthly Magazine 20 (108): 123-128. Beer, R. E. (1963): Social parasitism in the Tarsonemidae, with description of a new species of tarsonemid mite involved. Ann. Ent. Soc. Amer. 56 (2): 153-160 Delfinado, M. D. (1978): Terrestrial mites of New-York-VI. Further notes on Tarsonemidae (Acarina). New York Entom. Soc. 86 (2): 66-86. Deliéi, A. és Szendrey, L.-né (1992): Újabb adatok a kertészeti növényeken károsító tetüatkák (Acari: Tarsonemidae) ismeretéhez. Folia ent. hung. 53: 193-196. Garcia Mari, F., Fcrragut, F., Marzal, C, Costa Comelles, J. y Laborda, R. (1986): Acaros que viven en las hojas de las citricos Espanoles. Inv. Agrar.: Prod. Prot. veg. 1 (2): 219-250. Gerson, U. (1971): The mites associated with citrus in Israel. Israel Journal of Entomology 6: 5-22. Györffyné Molnár, J. (1987): Veszprém megyei szőlőültetvényekben élő atkafajok dominanciaviszonyai 1985-ben. Növényvédelem 23 (5): 202-204. Kaliszewski, M. (1993): Key to Palearctic of the Genus Tarsonemus. Acari, Tarsonemidae. Seria Zoológia 14. UAM. Poznan, 204 pp. Keifer, H. H. (1952): Eriophyid Studies XIX. The Bulletin Dep. of Agric. State of Calif. 41: 69-70.