O. G. Dely szerk.: Vertebrata Hungarica 8/1-2. (Budapest, 1966)

Topál, Gy.: Some observations on the nocturnal activity of bats in Hungary 139-166. o.

of the State Theater on the main street of the town, there lodged probably a colony of Eptesicus serotinu

s, in 1956. On one occasion, I observed the nocturnal activity of this population. Deszkáspuszta (19°2'E, 48°1'N; 285 m a.s.l.). Situated in the Mts* Börzsöny, near the village Bernecebaráti. The locality of observation was in the eastern end of the northwest Nagyvölgy in a preponderantly woody environment. Németbánya (17°40'E, 47°12»N; 396 m a.s.l.). In the Mts. Bakony. The bats were bagged at the lumbering yard near the forestry house east of the village. Hubertlak (17°41'E, 47°17'N; 260 m a.s.l.). Mts.

Bakony. Bats were shot near the forester's house in the wooded area near the village Bakonybél. Kisszépalma-puszta (17°46'E, 47°18'N; 450 m a.s.l.). In the Kts. Bakony. Several Nyctalus leisler

i had been shot on a larger clearing in the forest, near the forester's house. Results of observations per species I have collected most data referring to Rhinolophus euryal

e. By direct observations of evening and morning activities and netting on banding days, I succeeded to show in the Pisznice Cave that this relatively slowly flying species is the first to leave its daytime shelter and returning as the last one In the morning. Hence this one spends the most time in the free. According to my observations, the bats had never returned to the Pisznice Cave during the night, and I was unable to find their nocturnal entering or feeding quarters in the neighbourhood. It is worthy of note that I received a strongly divided activity curve for the evening survey of 18 June, 1957. The same can be seen for the end of July (21 July,

1958; cf. Figure l). Though the numerical values differ, the first maxi-