Larvae of the aphidophagous species of hoverflies are of major importance in regulation of the number of aphids. The main goal of the investigations was to perform faunistic analysis of the family Syrphidae.

The analyses were carried out in the tobacco biocenosis in the Prilep area. We used the following methods: examination of 20 tobacco stalks, the examination of 100 tobacco leaves, the yellow water vessels method, the insect-catcher method and faunistic analyses with the following parameters: active dominance, active abundance, consistency or frequency.

The quantitative analyses is based on final evaluation of the total number of collected individuals: 2900 of Sphaerophoria scripta L., 2147 of Sphaerophoria rueppelli Wied., 1833 of Scaeva pyrastri L., 647 of Episyrphus balteatus De Geer, 146 of Eupeodes corollae Fab., 2 of Syrphus ribesii L., 184 of Paragus quadrifasciatus Meig., 5 of Paragus bicolor Fab., 19 of Paragus tibialis Fallen, 101 of Melanostoma mellinum L., 21 of Eristalis tenax L., 7 of Eristalis arbustorum L. and 15 of Syritta pipiens L.

S. scripta, S. rueppelli, S. pyrastri and E. balteatus are dominant species. E. corollae, P. quadrifasciatus and M. mellinum are sub-dominant species. Other species have very low dominance and they are sub-recedent species. S. scripta was the most numerous species in each year of study and by all study methods. S. scripta was euconstant species in 2004 and 2005 and was constant in 2003. S. rueppelli was a constant species during all years. S. pyrastri, E. balteatus and E. corollae were confirmed as less constant. Other species were accidentally present in tobacco entomocenosis in Prilep.

The increase of larval abundance of aphidophagous hoverflies approximates the period of mass reproduction of aphids in tobacco. Based on the results, S. scripta, S. rueppelli, S. pyrastri and E. balteatus can be used for biological control within the integral protection of tobacco against aphids.