S. Mahunka szerk.: Folia Entomologica Hungarica 59. (Budapest, 1998)

Each characteristically differential species of the Mountainous zone (III) (Table 3) are so-called "Angaran" cold steppe species of classic Siberian spreading and of the Mountainous spreading in West and South-West. Stauroderus scalaris - shows the most interesting spreading (similarly to that of Stenobothrodes eurasius, for example). The area of this species is continuous in other regions, but it becomes disjunctive in Europe because these animals are attached only to relatively higher territories of the mountainous regions in Europe (Fig. 4). Populations of Metrioptera brachyptera (Fig. 4) and Arcyptera fusca (Fig. 4) were significantly forced back during the last years (in the last 10 years of the study their occurrence could not been shown). It seems that the climatic change of the last years, besides the progression of some Mediterranean elements (e.g. Phaneroptera nana), resulted in the regression of these two species. Submountainsous zone (II) has no differential species (Table 3). Species occurring here are partly common with that of zones I and II. Among the common species of zones I and II the following should be noticed: Pachytrachys gracilis, Rhacocleis germanica, Stenobothrus nigromaculatus, Myrmeleotettix maculatus, Glyptobothrus vagans - these species are of rather southern character. Common species of zones II and III have partly Siberian - e.g. Tettigonia cantans, Chrysochraon dispar, Stenobothrus stigmaticus -, partly Mediterranean and moutainous e.g. Pholidoptera aptera -, and partly Western Asian character - e.g. Roeseliana roeseli. The existence of this special mixed fauna may be explained by the fact that forest (Quercetum, Querco-Carpinetum) is the most closed, while the unforested habitat, on Fig. 6. Distribution of Barbitistes serricauda (—) and Barbitistes constrictus (_._) (Rácz 1993)