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

In analysing the distributional as well as the flying period data of the braconid species listed in Table 1 and Figs 1-4 the following conclusions may be obtained: 1. If we consider each plant layer from a special viewpoint: how many braconid species were trapped, i.e. occurred, only in one single layer? - then the following species-assemblages may be grouped: a) Species trapped only in one layer: Only over canopy (25-27 m) - 2 species (3.2%): Acrogaster klugi, Microchelcmus nitens Only in canopy (12-14 m) - 4 species (6.4%): Macrocentrus thoracicus, Microplitis scrophulariae, Pseudovipio castrator, Triaspis flavipes Only in herb and shrub layer (0-3 m) - 22 species (35.4%): Aleiodes dimidiatus, A. periscelis, Ascogaster dentifer, Charmon cruentatus, C. extensor, Chelonus asiaticus, Choeras ruficornis, Cotesia cleora, Doryctes undulatus, Dinocampus coccinellae, Helcon claviventris, Homolobus infumator, Macrocentrus linearis, M. marginator, Meteorus cespitator, Microgaster hospes, Microplitis fordi, M. mandibularis, M. spinolae, Microtypus trigonus, Ontsira igneus, Peristenus laeviventris. Only in meadow (0-1 m) - 8 species (12.9%): Aspicolpus carinator, Ascogaster consobrina, Chelonus caradrinae, C. productus, Ichneutes reunitor, Macrocentrus bicolor, Meteorus gyrator, Peristenus adelphocoris. b) Summarizing the distribution of the braconid species trapped (and perhaps occurring) only in a single plant layer, the herb and shrub (0-3 m) layer excels with a preponderantly high number of species, i.e. 22 (35.4%) species occur in this layer alone. The second richest layer in braconids is the canopy (12-14 m) with 4 (6.4%) species; this number is surprisingly small considering the possible high number of the herbivorous (caterpillar etc.) species living in the canopy - the potential hosts of the braconids. Above the canopy only 2 (3.2%) braconid and in the meadow only 8 (12.9%) braconid species were caught. The total number of the braconid species occurring only in one single plant layer as well as only in meadow is 36, i.e. 60% of the 60 species. 2. Five species (8.3% of the 60 species) were trapped in all the four collecting sites of the oak forest (0-3, 12-14 and 25-27 m) and meadow (0-1 m): Ascogaster grahami, A. varipes, Atanycolus denigrator, Bracon variegator, Homolobus truncator. a) Ascogaster grahami receded rather to the herb and shrub layer from 12 April to 27 August fairly continuously in the months April and August and fairly sporadically during May-June-July. In the canopy (12-14 m) and over the canopy (25-27 m) few specimens were caught; outside the forest in the meadow (0-1 m) again fairly high number of specimens fell into the trap. The total number of the gathered specimens is 47 (Fig. 1). Two moth hosts are recorded for A. grahami: Infurcitinea argentimaculella Stainton (Lep., Tineidae) and Sorhagenia lophyrella Douglas (Lep., Momphidae) (Huddleston 1984: 363). The caterpillar of the first moth is feeding in moss (living e.g. on trunk of tree) and that of the second moth is saprophagous. Both species are distributed in Hungary, and, supposedly, occur also in the oak forest of Síkfőkút. In this case the relative frequency of the braconids is motivated in the shrub layer where moss on trunks as well as decaying mould are available in a sufficient quantity. b) Ascogaster varipes dispersed fairly evenly in the layers of the oak forest and in the meadow (see also Fig. 2). In Hungary it is a frequent to common species. Its hosts are