Dr. Murai Éva szerk.: Parasitologia Hungarica 25. (Budapest, 1992)

As regards the species of Fanniidae, specimens of 14 species were caught during our three year period. There are five among them which were missing from Mihályi's series, among them Fannia ringdahlana Collin, 1939, a species new to the fauna of Hungary We may admit here that the first known male (i.e. the first true voucher specimen) in Hungary of Coenomyia [now Fannia] mollissima Haliday, 1840 was also caught during our collecting period (cf. Mihályi 1975) Mihályi published 6 species which were not caught now. Thus the species identity (Jaccard index) of the two series of collectings is 9/20 = 0.45. As for the number of specimens, Mihályi reported 741 specimens, we collected nearly 5,000 specimens. As for the species representativeness of the Fanniidae, our conclusion is quite the same as with the sphaerocerids. Our very high number of specimens is attributed to the fact that we exposed traps always in shady places in forests, where species of Fannia are swarming. The dipterous group which was probably best represented in Mihályi's material is the family Muscidae. Those materials served as one of the bases for the collection of Muscidae now in the Hungarian Natural History Museum. Mihályi's materials are definitely richer (again, possibly due to the more various habitats he collected from). He found 22 species, which were not represented in our materials; we collected only 8 species which were missing from Mihályi's lists. No specimens of Musca domestica were trapped by us. Contrarily to our long list of muscid species (nearly 50 species), we must not state that the species compositions found would indicate representatively the human impact on the sites sampled. In other words, muscid assemblages in forests, sampled by our methods or by similar ones, are also unsuitable to indicate unfavourable changes in the environment. I can corroborate Mihályi's opinion on the "hemisynanthropic" species as regards their role in the transmission of infections (or on the reason for maintaining such a term). The probability of such a forest fly flying from a human faeces to humans is low. A certain time after its contact with faeces it may contact humans without causing any harm since bacteria or other infectious germs perish in/on its body. So the "hemisynanthropic" category of Gregor and Povolny (1958) may be even regarded as a misleading term. ACKNOWLEDGEMENTS I sincerely thank Dr. Éva Murai for encouraging me to complete this paper, postponed repeatedly. I wish to thank Dr. János Izsák (Department of Zoology, Berzsenyi College, Szombathely) for his helpful comments.