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)

work was finished. At 15 : 51, it flew away from the rim, and did not come back till 18 p. m. At that time, its burrow was 63 mm long, the external side of the turret being 30 mm. I did not observe it on 23 July. Fig. 3. Construction phases of Odynerus Nr. 3. at 12 : 03—14 : 48. Fig. 4. Construction phases of Odynerus Nr. 3. at 15 : 31—15 : 46. On 24 July, it appeard in front of its turret constructed on 22 July, at 9 : 40, it disappeared in it but soon emerged again and flew to and fro before the wall like its fellows, searching for nesting places. At 11 : 12, it began to excavate a fresh nest, abandoning it at 11 : 54, when it flew away. It was still hovering before the loess wall at 14 : 35. Its absence for the whole day of the twentythird and its omission to provision the cell by larval food could not have been the result of the lack of observation. The constructed nest