O. G. Dely szerk.: Vertebrata Hungarica 17. (Budapest, 1976)

Topál, Gy.: New records of Vespertiliomurinus Linnaeus and of Nyctalus lasiopterus (Schreiber) in Hungary (Mammalia: Chiroptera) 9-14. o.

6. No. 55. 20.1. o

71 Csanyik völgy 6 Febr., 1944 (skull only) 7. 4308 d" Budapest, Múzeumkert 6 April, 1949 (formerly listed as E. n. ) 8. Ráckeve 19 55 (2 skulls from owl pellets) 9. 69.11.1. o Budapest, Marx tér 26 Jan., 1969 10. 73.112.1. cT Budapest, Városliget 12 Sept., 1973 The two last specimens were found injured and dead and subsequently sent to our Museum by schoolboys. Thesui new records appear nearly 20 years after the preceding one in 1949. Obviously, both specimens were wintering, or, at least one of them was found on the way to its hibernation quarter. According to Dr BAUER (personal communication), the Natural History Museum in Vienna also obtained recent specimens during this period. The majority of both sexes of V. murinus listed above also indicate hibernating individuals. Probably exceptional and the most interesting case is that of the female collected in the Garadna völgy at Lillafüred (valley of the Garadna brook) on 7 June, 1943. It calls attention to the possible occurrence of the females in this country during also the reproductory period. Unfortunately, the single skull itself is no proof of a reproductive individual. As regards the Hungarian locality records of V. murinus in the literarure, one part of them fail to give the exact date of occurrence (e.g. Budapest, Óbuda, PASZLAVSZKY 1918; Budapest, Városliget, PASZLAVSZKY 1918; Aggtelek, PASZLAVSZKY 1918; Hollóháza, PASZLAVSZKY 1918; Tihany, HOMONNAY 1938), and even the identification of the Aggtelek animal is highly doubtful, because the specimen is missing. The other locality records (VÁSÁRHELYI 1942) suggest hibernating specimens

. It would be worthwhile to collect all available data and to review the records regarding the date of occurrence of this species for the whole of Europe. It seems probable that the occurrence of Vespertilio murinus in Hungary is connected mostly with hibernation and migration. It is also probable that the degree of migration depends on the weather conditions of a given year. The European distribution of Nyctalus lasiopterus is poorly known, although a number of papers contain locality records. Unfortunately, these are partly without details and notes on ecology, reproduction, etc. (DULIC 1959; HANÁK & JOSIFOV 1959; KAHMAN 1962; RUPRECHT 1970; STRELKOV 1969; TOPÁL 1959; WOLF 1964). The species is one of the biggest and rarest one in Europe. The reason of its rarity is probably due to its ecology, and to the fact that it is one of the tree bats. Therefore it is more difficult to observe and to study it than is the case with many other bats. Evidently, its population density is also smaller in orders of magnitude than e.g.that of Nyctalus noctula throughout Europe. This must be the primary reason of the rarity of captures. The list of the known specimens from Hungary is as follows. All are in the collection of the Hungarian Natural History Museum.