S. Mahunka szerk.: Folia Entomologica Hungarica 55. (Budapest, 1994)

forest. The observation that occasionally the scolytid is feeding in aspen (Populus tremula) is less significant in our case because aspen-trees are more sporadic in Síkfőkút. Consequently, the enigma may be solved by assuming that there is (are) further host(s) of M. consimilis hitherto unrecorded in the literature. 5. The fluctuation of the braconid species during the vegetation period, i.e. considering their phenology (Fig. 5), in the Turkey oak-sessile oak forest of Síkfőkút was found to be usual and "tranquil" interchange of the species-assemblages. In their phenology from April to November 1987 no cumulative mass of the species occurred nor a decrease in number leading to the disappearance of any of the species. In this respect, however, it should be pointed out that the low number of the species (60) and the moderate number of their representation (326) witnessed in one year restricted and predestinated the potential outputs. If the Síkfőkút Project would have the opportunity to operate twice or more contingents of Malaise-traps then the obtainable results would be, I am convinced, more reliable and much nearer to the real relations of the nature. In Fig. 5 the phenology of the 60 braconid species is shown in a coordinate. On the abscissa (x-coordinate) the vegetation period is indicated in ten-day decades from 11 April to 30 November 1987; on the ordináta (y-coordinate) the numbers (1-13) of the species are given. The species number fluctuates between the values 2 to 12, the average number is 6. Parallel with the trapping the meteorological characteristics (temperature, precipitation, humidity of air, direction and velocity of wind, atmospheric pressure) were measured every day. Comparing these characteristics to the phenology of the braconids no effective meteorological influences can be established in their flying activity. Noteworthy to remark that during the vegetation period of 1987 the meteorological conditions in Síkfőkút were normal, i.e. no striking anomalies interfered the daily weather. * * * Concluding remark. - The Turkey oak-sessile oak forest of Síkfőkút extends over 64 hectares in which, supposedly, about 200 braconid species are living in different quantity of population per species. The species-assemblage and the phenology of the braconids were studied in one small plot of the forest with the help of four Malaisetraps. The traps had been operating (i.e gathering the braconids) day and night and, implicitly, we consider their operation as sampling the braconids "from the forest". The traps, however, were operating in one single point of the forest chosen by us, therefore, delivered rather a sample of the braconids active in their surroundings and not from the forest in general. From among the active braconids those fell into the traps which, rather accidentally, were "baited" by the traps. Nevertheless, it is reasonable to suppose that the proportional composition of the trapped braconids reflects, in space and time, the assemblage and phenology of the braconids corresponding to the natural relations. To expound more objectively the trapping results, it may be ascertained that in the Síkfőkút oak forest during the vegetation period of 1987 about 60 braconid species were really active in proportional quantities and fluctuating compositions reflecting the true intercourses in the forest.