The paper deals with both quantitative and qualitative aspects of the
occurrence of hoverflies in the area of the Danube (Gabeikovo - Nagyma
ros) waterworks construction site in the years 1984 - 1985. Closer att
ention is devoted to aphidophagous species. An extended number of loca
lities was documented for the species Pipiza lugubris (FABRICIUS, 1775
) and Paragus quadrifasciatus (MEIGEN, 1812).