FAUNISTIC-ECOLOGICAL ANALYSIS OF HOVERFLIES (DIPTERA, SYRPHIDAE) IN SOME LANDSCAPE ELEMENTS OF THE DANUBIAN LOWLAND WITH A SPECIAL REFERENCE TO THE APHIDOPHAGOUS SPECIES .2.

We have been searching for the functional meaning of Danubian Lowland landscape elements (7 non-agricultural habitats) from the point of occ urrence of syrphidofauna, mainly the representatives of aphidophagous species. Aphidophags were the prevailing trophic subgroup nearly on al l habitats. The species Episyrphus balteatus and Sphaerophoria scripta achieved the eudominant and dominant representation within these habi tats. The greatest occurrence of Episyrphus balteatus was observed on the habitats with the representation of timber species. Sphaerophoria scripta occurrence on these habitats is determined by the richness of the herbaceous vegetation. From what was stated above it follows that we could create prerequisities for the hoverflies concentration (mainl y for the two presented species) for the needs of their possible usage in preventive biological control of agricultural cultures by an appro priate combination of timber and herbaceous vegetation.