S. Mahunka szerk.: Folia Entomologica Hungarica 46/2. (Budapest, 1985)

Peus, 1948, that was registered within the Carpathian Basin by ROSICKY (1957) and JURIK (1962). Here it should be mentioned nevertheless, the PEUS* s (1972) theory regarding the later immigration of the more adaptable species of N. fasciatus to Europe and after contact with populations of native steppe species (or subspecies) of N. paganus was not certified by our investigations. The continuous transition of morphological features between "

fasciatus" and "

paganus

" is found in exoanthropic (steppes inhabiting) as well as synathropic populations in isolated mountain settlement. The European distribution of N. fasciatus by means of synanthropic populations of brown rat (Rattus norvegicus

) in historical period (PEUS, 1972 and others) could cause the restriction of the distribution of N.mokrzeckyi in accordance with a similar retreat of steppe inhabitants (Spalax. Citellus and others). The ecological status of N. fasciatus within the synusia of fleas on mouse-like rodents inhabiting secondary steppes in the Pannonian area is similar to that of M. turbidus among fleas on inhabiting rodents. They both might be considered as relatives from taxonomical and ecological points of view. Some features, e.g., their host organisms, seasonal dynamics are similar. It means,they substitute each other mutually within the parasitocenoses in suitable ecosystems as to functional point of view. The measure of participation of either interspecific competition will be testified experimentally, or their own eco-physiological dispositions on that ecological vicariation. The regard to that interesting aspect of ecological distribution was a reason to summarize the results of s-tudy on the territorial distribution of species of both genera within the family Ceratophyllidae in this contribution. REFERENCES BEAUCORNU, J.C. (1976): Notes sur les Ceratophyllidae (Slphonaptera) de la faune Française inféodés aux mammifères. - Ann. Soc. ent. Fr. (N.S) 12: 199-213. CYPRICH, D., KIEFER, M. and DUHA, J. (1984): Die Ylöhe (Siphonaptera) der Säugetiere und Vögel des Donau-Auwaldes im Naturschutzgebiet "Cicovské mrtve rameno". - Sprav. obl. Podunaj. múz. v Komámé, 4: 46-53. DUDICH, A. (1982): Fleas (Sipfhonaptera) of the small mammals of Záhorská nfzina lowland and Male Karpaty Mts (Western Carpathians). - Acta Rer. nat. Mus. nat. Slov., 28: 91-108. DUDICH, A. (1982): Annotated survey of small terrestrial mammal (Insectivora, Rodentia) ectoparasites on Orava (North Slovakia, West Carpathians). - Oravské múzeum,2/1982: 38-53. DUDICH, A. and SZABÓ, I. (1984): Flea species new for the Hungarian fauna. VII. Annls. hist. nat. Mus. hung., 76: 239-244. DUDICH, A. and MATOUSEK, B. (1985): Fleas (Insecta: Siphonaptera) from the collection of Slovak National Museum in Bratislava. - Acta Rer. nat. Mus. Nat. Slov. (in press). HAITLINGER, R. (1973): To the knowledge of Siphonaptera and Anoplura fauna of the small mamr mais in Hungary. - Parasit, hung., 6: 205-213. HELLON, B. and RAUHUT, W. (1967): Fleas (Siphonaptera) collected in nests of common vole Microtus arvalis (Pallas) from the surroundings of Poznan nad Pleszew. - Badania fizjogr. Polska zach. (Poznan), 20: 123-132. JURÍK, M. (1962): Contribution to the knowledge of Aphaniptera in CSSR II. (Nosopsyllus Jordan, 1933). - Biológia (Bratislava), 17: 383-387. KIEFER, M. (1966): Aphaniptera of the brown rat (Rattus norvegicus Berkh.) in certain regions of Slovakia. - Thesis. Bratislava, pp. 86. KOSTOVClkoVA', J. (1981): Fleas (Siphonaptera) of the West Slovakia. - Thesis. Bratislava, pp. 105. PEUS, F. (1969): Flöhe aus Österreich. - Ber. nat.-med. Ver. Innsbruck, 57: 153-158. PEUS, F. (1970): Zur Kenntnis der Flöhe Deutschlands (Insecta, Siphonaptera). III. Faunistik und Ökologie der Säugetierflöhe. - Zool. Jb. Syst., 97: 1-54. PEUS, F. (1972): Zur Kenntnis der Flöhe Deutschlands (Insecta, Siphonaptera). IV. Faunistik und ^Ökologie der Säugetierflöhe. - Zool. Jb. Syst., 99: 408-504. RAUSER, J. and Z LAT NIK, A. (1966): Biogeography I. Atlas of the Czechoslovak Socialistic Republic. Praha, p. 21-22. REICHSTEIN, H. (1978): Mus musculus Linnaeus, 1758 - Hausmaus. - In: NIETHAMMER, J., KRAPP, F. Eds.: Handbuch der Säugetiere Europas. Bd. 1: 421-451. Wiesbaden. ROSICKY, B. (1957): Blechy - Aphaniptera. - Fauna ÖSR 10, Praha, pp. 439. ROSICKY, B. and CARNELUTTI, J. (1959): Beitrag zur Kenntnis der Flohfauna Sloveniens. - Cs. parasitoL, 6: 135-148.