In their study, the authors publish data on species of reticulated terrestrial areas of the Nature Reserve «Medobory» (Ukraine). The results of the analysis of literature sources are described. Preliminary data on the species composition and distribution within the Ternopil region were obtained from the publications of J. Dzendzelevych and from the dissertation research of O.V. Zakharenko. There were no documented finds for the territory of the Medobory Nature Reserve. In 2017 and 2018, one field trip was carried out, and in 2019 during the growing season in ten research sites the collection of material was carried out by combined traps. New faunal data are reported for 20 of the 26 already known species of reticulate in the Ternopil region. In the Medobory Nature Reserve, the study of net-winged was carried out for the first time, and a checklist is provided. Features of their development and priority places for settlements, food and wintering are described. The analysis of distribution and seasonal dynamics of the number of reticulated species and individuals during the vegetation period was also carried out. In total, for the first time, 20 species of reticulated beetles from eight genera and three families were recorded for the territory of the Medobory Nature Reserve. For the first time for the Ternopil region, the findings of nine species of reticulate insects are indicated. Species Hemerobius gilvus Stein, 1863 was first registered in mainland Ukraine.

As a result of the research carried out in the upper border of the forest of the Poloninsk ridge, a total of 162 individuals of 16 species, from 8 genera and 2 families of net-winged insects (Neuroptera) were collected. Including - 1 species from the genus Chrysopa, 1 - Chrysoperla, 1 - Hypochrysa, 2 - Nineta, 1 - Drepanopteryx, 4 - Hemerobius, 3 - Micromus, 3 - Wesmaelius. It was established that most of the numerical values of the indices of species richness and diversity, except for the Berger-Parker index and the Margalef index, have higher values for the Stink Ridge. That is why we believe that the upper limit of the forest on the Stinka ridge has changed less under the influence of the anthropogenic factor. In our opinion, the higher value of the Berger-Parker index for Yavirnyk is associated with a significant degree of dominance of the mass species Hemerobius micans, and the Margalef Index is associated with the fact that more species of reticulata were registered here and the number of specimens collected is much higher. In all the collected material, Hemerobius micans accounts for 75.1% on Yavirnik and 54.8% on Stinka of the total number. There are also no recedents and subrecedents in the Neuroptera group on Stinka. The deviation from the normal distribution of species abundance in the direction of increasing dominance of several species allows us to state that both ecosystems are subject to anthropogenic stress, but are at different stages of successional processes.

Wesmaelius subnebulosus (Stephens, 1836) is a widespread species with a holarctic type of habitat. It is registered in most European countries, in Asia Minor, North and South Africa, Madeira and the Azores, as well as in North America. It is also known from New Zealand, where it was apparently imported and successfully adapted to environmental conditions, primarily due to the ability to inhabit anthropogenic landscapes. The species is most numerous in the Mediterranean region and is much less common in Northern Europe and other continents.

These findings of Dendroleon pantherinus allow to expand modern ideas about its distribution in Ukraine and supplement the list of regional insect fauna of the Transcarpathian region with another species of reticulate, which is among the rare in the fauna of Europe. We also recommend this species for the new edition of the Red Book of Ukraine. Preservation of habitats, namely areas with old hollow trees, will help preserve populations. Formally, D. pantherinus is protected as part of the natural ecosystem of the Berehiv Hills Reserve.

The species composition of the net-winged insects fauna, as well as the biotope distribution within the territory of the Ukrainian Carpathians have been studied. For the first time, an altitude-band analysis of the distribution of net-winged insects in the Ukrainian Carpathians was conducted, which showed that the highest species diversity is characterized by the belt of oak forests, for which 50 species of reticulated net-winged insects are listed. Seven were found to be original for the belt: Chrysopa hummeli, Chrysopa dorsalis, Chrysopa hungarica, Chrysopa nigricostata, Sisyra nigra, Distoleon tetragrammicus, Libelloides macaronius. These species occur only in this zone and are very rare. It was found that the highest species diversity is characterized by mixed forests and forest edges, for which 39 species were identified, which is 78% of the total number of species that occur in the belt of oak forests. The highest Magralef index for mixed oak forests (Quercus, Tilia, Acer, Fraxinus, Ulmus, etc.). For the belt of beech forests, there are 43 species. It was found that the greatest species diversity is characterized by forest edges, there are 32 species, which is 74% of the total number of species of beech belt of the Ukrainian Carpathians, 31 species (72%) in beech forest with admixtures of other deciduous trees. 29 on the edges and in the old beech forests (virgin forests). The highest index of species richness according to Margalef falls on the edges. As part of the spruce forest belt, 24 species were noted, ten of which, namely Wesmaelius mortoni, Wesmaelius nervosus, Wesmaelius ravus, Wesmaelius tjederi, Wesmaelius concinnus, Wesmaelius quadrifasciatus, Hemerobius contumax, Hemerobius feumax, Hemerobius fenestih only within the belt of spruce forests. Margalef's highest index characterizes young spruce forests. In the subalpine zone, only four species of reticulated net-winged insects were found – Myrmeleon formicarius, Wesmaelius nervosus, Wesmaelius ravus and Chrysoperla carnea, in the alpine zone – none.