SAWFLY (HYMENOPTERA, SYMPHYTA) COMMUNITY IN THE DEVINSKA-KOBYLA-NATIONAL-NATURE-RESERVE

A sawfly community was studied in the Devinska Kobyla National Nature Reserve (south-western Slovakia, area: 0.28 km(2)) during the growing season of 1994. A total of 1929 individuals belonging to 119 species w ere collected using two Malaise traps. Nine species were found in Slov akia for the first time. Together with data from previous studies, 232 species have been recorded in the reserve. One eudominant (Athalia ro sae) and three dominant species were found. In spite of the high speci es richness, low evenness and diversity were indicated by a modified H ill's ratio (E5 = 0.37) and Hill's diversity numbers (N1 = 25.97, N2 = 10.29). A sex ratio close to 1:1 was found in the studied sawfly comm unity. A male-biased secondary sex ratio prevailed in dominant and sub dominant species. Sawflies were found to produce two main emergence wa ves, the first in spring (April, May) and the second in late summer (A ugust, September). Seasonal flight patterns of Athalia cordata, A. ros ae, Tenthredopsis litterata and T. stigma were described. The effects of precipitation and temperature on the course of flight activity are also presented as part of the study.