Dr. Éva Murai szerk.: Miscellanea Zoologica Hungarica 2. 1984 (Budapest, 1984)

Dudich, A.: Fleas (Insecta: Siphonaptera) from small mammals in the Čergov Mountains (Western Carpathians, Czechoslovakia)

on other microtine rodents only accidentally. The very remarkable niche segregation between the previous congeneric species and A. arvicolae (Ioff) is achieved first of all by host preference. Megabothris turbidus (Rothschild, 1909) Collection data: Circ-Mindol 1975 - PT, 0/1; Lenartov 29 Jan., 1975 - 0/1 on A. flavi collis

; Hertnik 26-28 Aug., 1980 - 8/37 on 22 C. glareolus

, 15 A. flavicollis

, 4 A. agrárius

, 3 P. subterraneus

, 1 S. alpinus

. Nosopsyllus fasciatus (Bosc, 1801) Collection data: Lenartov 10-12 Nov., 1981 - 0/1 on A. flavicollis

. Note. This cosmopolitan and mostly synantropic species does not occur in natural montane conditions. Our only specimen was collected from a hemisynanthropic yellow-necked field-mouse which was trapped in a gamekeeper's cottage. Ceratophyllus sp. Collection data: Livov 20-23 April, 1982 - 0/1 on S. alpinus

. DISCUSSION The studied area - Cergov Mts - belong to the greater geographical unit East Beskydy within the orographical subsystem of the Western Carpathians (MAZUR & LUKNIS, 1978), situated just on their eastern margin. Analysing the flea fauna of the small mammals of the discussed region, we found a number of groups with different distribution pattern. Most important from zoogeographical point of view are, on one hand, species with limited distribution, e.g. oreal and boreo-oreal species, on the other hand, polytypic species with at least two geographical races in the investigated area. Six of the eight species with oreal or boreooreal type of distribution are continuously distributed over the montane zone of the Western and Eastern Carpathians (

A. nuperus

, C. obtusus, C. uncinatus, P. steini, R. aff. isacantha, R. integella)

. Two of them - A. penicilliger kratochvili with an oreal distribution over Central-European mountain ranges and Peromyscopsylla silvatica - an Eurosiberian species show different distribution patterns. The first one occurs in the studied area within its continuous range of distribution in the Western Carpathians. At the same time the eastern border of the distribution of this species passes through the Cergov Mts. The other part of the disjunct area of distribution in Europe is situated at a distance of over hundred kilometers east, in the Soviet Eastern Carpathians. Nearly the same distribution is shown by P. silva tica, but this species does not reach the Cergov Mts from the western part of its present disjunct area. The eastern races of several polytypic species, such as C. agyrtes kleinschmidtianus, D. dasycnema cuspis and P. soricis starki also occur in the studied area. They also extend some distance westwards from the Cergov Mts to the western limit of their distribution (BARTKOWSKA, 1973, 1977; HAITLINGER, 1978; RYBA, 1977). The distribution patterns of these two species-groups point out from zoogeographical point of view the transitional position of investigated area between the Western and Eastern Carpathians. REFERENCES BARTKOWSKA, K. (1973): Siphonaptera of Polish Tatry Mts (in Polish). - Fragmenta Faunistica (Warszawa), 19: 227-281. BARTKOWSKA, K. (1977): Some investigations on Siphonaptera in the Western Beskydy Mts.Wiad. parazyt., 23: 219-220. HAITLINGER, R. (1974): Fleas (Siphonaptera) of small mammals of the Pieniny, Poland. Bull. ent. Pologne, 44: 765-788. HAITLINGER, R. (1978): Die Flöhe (Siphonaptera) der Kleinsäuger der Westbeskiden. - Bull. ent. Pologne, 48: 287-309. MAZUR, E. & LUKNIS, M. (1978): Regional geographic division of Slovak Socialistic .Republic (in Slovak). - Geogr. casopis, 30: 100-125.