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

galls, but as it had been observed before, in the Cecidomyiidae living in the internodia below the gall. To separate Lipara galls from the stem is sometimes difficult, or even impossible. To find out where the gall begins on a stem, the covering leaves must be removed, which increases the risk of desiccating the gall. There are parasitoid species in the material {Aprostocetus sp. I., sp. 2., sp. 3.), with their hosts remaining still unidentified. There is a very special group of Hymenoptera which emerged from desiccated twoyear-old L. lucens galls. This group consists of inquiline species (Pemphredon lethifer and Hylaeus sp.), and the parasitoids of the inquilines (Gasteruption kriechbaumerï). The results of our research seem to be verified by the fact, that the five most common Hymenopteran species happen to be parasitoids of the Lipara species. These five species emerged from the bulk (87.4%) of the galls (Table 3). The species Polemochartus liparae was the most common (38%) and was found at most of the sites (18). It is followed by Polemochartus aboletus and Stenomalina liparae of identical values (15.7%; 15.7%). Concerning the number of localities, these species are similar, too (12;9). The next in the order of frequency is Polemochartus melas (10.2%), coming from 6 localities. Tetrastichus légionárius emerged only 33 times (7.8%), from samples of 10 different sites. Based on the results on parasitoid Hymenoptera the average extent of infection of Lipara galls is 9.5%. The highest number of the Hymenopteran species came from the rearing pots of L. lucens (14), which was followed by L. similis, with 8, L. pullitarsis with 5, and L. rufitarsis with 3 species. NEW REARING RESULTS BRACONIDAE Polemochartus aboletus Papp, 1992 The scientific description of this new species is based on specimens reared in the frame of this project (Papp 1992, Dely-Draskovits et al. 1993). The specimens emerged from Lipara similis galls. Distribution: Type specimens are from Hungary and Switzerland. It might be too early to settle its area of distribution, which probably extends over Central Europe. Rearing data*: L. similis: 1:11, 2:31, 3:5, 9:2, 10:3, 14:2, 15:2, 18:1, 22:3, 23:2, 24:3, 25:1. Altogether, the 66 specimens came from 12 sites. Most of the specimens were found in Fertő-Hanság National Park, in the region of Lake Balaton and Bátorliget, but it is scattered all over the country. This is the second most common parasitoid of the Lipara galls, giving 15% of all the occurrence of Hymenopterans in Lipara galls (Table 3). * The first number, before the colon marks the locality given on the map in Fig. 1. The second number, after the colon gives the number of specimens of the reared taxon.