Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 53. (Budapest 1961)

Móczár, L.: The distribution of wild bees in the lucerne fields of Hungary (Hymenoptera, Apoidea)

and Halictus eurygnathus. The results have only an informatory character, owing to déficiences in the collectings. In the area beyond the Tisza, we studied the wild bees in three sites. In the Nagykunság, Melitta leporina dominated in the first year, followed by Eucera clypeata in the two next ones. However, there is a strong possibility that the dominant species was Eucera in all three years, because the data of the first year are very meagre and thus cannot be generalized, further, because Eucera clypeata was present in rather great numbers also in that year. The subdominant, for two years, was Melitta leporina, superseded by Eucera clypeata, Bombus terrestris and B. lapidarius in the third one. The easternmost surveys of the country were made in the Hajdúság. The collectings had identical results in both years, with Andrena ovatula having been the dominant, and Bombus lapidarius and B. terrestris the subdominant, species. In any case, this speaks for the soundness of the surveys. In Com. Békés we investigated the lucerne fields in three localities. In Székkutas, Andrena ovatula was the dominant species for one year, with Eucera clypeata, E. nitidiventris and Melitta leporina plying the role of the subdominants. We collected for two years in Szarvas. The results are different : the dominant species were partly Eucera clypeata partly Halictus eurygnathus, the subdominants Melitta leporina, Andrena ovatula (for two years), and Bombus lapidarius and Halictus eurygnathus for one year. In Bánkút, the collecting activities were carried out for three years. In the first year, Halictus rubicundus in the second and third year, Eucera clypeata were the dominant species. Of the subdominant species, Melitta leporina and Andrena ovatula appeared for two years, and Halictus vestitus for the third one. If the lucerne fields of Com. Békés be considered together, it will be found that Eucera clypeata dominated in all three years, while Halictus rubicundus, H. eurygnathus and Andrena ovatula played this role respectively for one year. Of the subdominants, Melitta leporina came to the fore on five occasions, Andrena ovatula on three, and Eucera clypeata, E. nitidiventris, Bombus lapidarius, Halictus eurygnathus and H. vestitus once, respectively. Summing up, we may establish the fact that, in the larger part of the Transdanubium, Melitta leporina was the dominant lucerne-visiting wild bee. Eucera clypeata had the same role in Com. Fejér, in the Great Plains and in the larger part of the territory beyond the Tisza, with Andrena ovatula in the Hajdúság. By their greater numbers, the following subdominant species played yet an important role in the pollinating work : Bombus lapidarius and B, terrestris in the Hanság and the Hajdúság, Melitta leporina and partly Andrena ovatula in Com. Fejér, the Kiskunság and the Nagykunság, Eucera clypeata and E. cinerea in Com. Somogy, and mainly Melitturga clavicornis in the southern Corns. Baranya and Csongrád. References : 1. B i e b e r d o r f, G-. A. : Some observations on pollination of alfalfa hay (Proc. Okla. Acad. Sei., Stillwater, 30, 1951, p. 49—51). — 2. B o c h a r t, G. E. : Pollination of Alfalfa and Red Clover (Ann. Rev. Ent., 2, 1957, p. 355-380). — 3. J u g a, V. G. & S c o b i o 1 a, X. : Despre principalele Apoide polenizatoare ale lucernelor (Omagiului Traian Savulescu eu Pril. Imohn. a

'70 de ani, 1959, p. 337—346). — 4. L e s i n s, K. : Investigation into seed setting of lucerne at Ultuna, Sweden 1945 — 1949 (Ann. Royal Agr. CoUege, Sweden, 17, 1950, p. 441—483). — 5. L i n s 1 e y, E. G. : Insekt pohinators of alfalfa in Cahfornia (Journ. Econ. Ent., 39, 1946, p. 18—29). — 6. M ó c z á r, L. : Flower-Visiting on a Meadow and a Lucerne Field (Ann. Hist.-nat. Mus. Nat. Hung., S. n., 5, 1954, p. 387 — 399). — 7. M ó c z á r, L. : A lucernavirágot látogató méhalkatú rovarok Baranyában (Janus Pannonius Múzeum Évkönyve, 1956, p. 171-180). - 8. M ó c z á r, L. : The Activity of the Wild Bees (Hym.