S. Mahunka szerk.: Folia Entomologica Hungarica 56. (Budapest, 1995)

Table 8 (continued) Species of Apoidea Quercetum petraeae-cerris Festucion 25-27 m 12-14 m 0-3 m 0-1 m Megachile centuncularis (Linnaeus, 1758) 06.06: 2 ? Nomada flavoguttata (Kirby, 1802) 07.15:1 $ Nomada panzeri Lepeletier, 1841 05.20: 1 d Osmia rufa (Linnaeus, 1758 06.06: 1 Ç Sphecodes ephippius (Linnaeus, 1767) 05.27: 1 Ç 07.17: 1 d 07.15: 1 d 19: 1 d 05.07: 1 d 07.22: 1 d 29: 1 d Total number of species: 22 Total number of specimens: 52 Number of species taken only above canopy (25-27 m): in the canopy ( 12-14 m) : 1 in the shrub + herb layer (0-3 m): 8 in the meadow (0-1 m): 5 Species trapped in four layers: 1 in three layers: in two layers: 7 25-27, 0-3 m: 3 0-3, 0-1 m: 2 12-14,0-3 m: 1 12-14, 0-1 m: 1 with catching one to four species decade by decade. At the decades 1-10 June (one decade) and 11-31 July (two decades) the bees show culminations with species numbers 7 and 10 + 6, respectively. We suppose that this course of the curve (Fig. 4) shows their activity as approaching the natural relations. Andrena minutula is frequent to common in Hungary as well as in Europe, an euryoecicous-hylophilous and arboricolous species (Józan 1990: 83 and 84). The arboriphilous requirement appears in its foodplant combination which comprises many flower genera living in oak forest (Aegopodium, Cirsium, Fragaria, Hieracium, Leontodon, Tussilago, Veronica; Dylewska 1974: 64). These flowers are breeding and abundant in Síkfőkút, too. A total of seven specimens (2 + 5 dd ) were caught in the shrub + herb layer (2 + 3 dd ) and in the meadow (2 dd ); the captures in the course of time show long intervals from 28 April to 28 July in the shrub + herb layer and from 20 May to 21 July in the meadow (see Table 8, too). Heriades truncorum is distributed in Europe; in Hungary frequent to common (M. Móczár 1958: 47, Józan 1990: 86). It prefers to build its nest in cut wood-trunk, woodcolumn or the like; nectar and pollen of composite flowers are favoured as food source for the progenies too. An euryoecicous-thermophilous species, its thermophyly is indicated by its flying period which is restricted to the summer months from the middle June to the middle September (M. Móczár I.e.). In Síkfőkút, there were trapped a total of five