Boros István (szerk.): A Magyar Természettudományi Múzeum évkönyve 52. (Budapest 1960)

Móczár, L.: The loess wall of Tihany and the nesting of Odynerus spiricornis Spin. (Hymenoptera, Eumenidae)

of also those turrets in which the mud daubers were active on the respective days. I used red india ink on 6 July, and then lacquer paints on 20 (pink), 21 (blue), 22 (green), 23 (ochreous yellow), 24 (orange) July. Fig. 1. Temperature conditions during the days of observations. The effects of the markings on the Odynerus specimens in the various phases of their nest-building activities manifested themselves in the following ways. A wasp at the commencement of its nest-building and dazed by acetic ether revived in thirty minutes and it flew off the wall after another 4'45". Nor did it come back. I chilled another Odynerus by ice at 16 : 50, replacing it after the marking process in its dugout in the wall. It came shortly to, and flew away, but it resumed its work only the next day at 10 : 18. I marked another wasp at the com-