As the fourth hydrophilous species of the genus Typhloiulus Latzel, 1884, the new species T. balcanicus Antić sp. nov. is described from two caves in the Stara Planina Mountains of Serbia. A brief discussion of the relationships between the new species and congeners with modified and unmodified mouthparts is presented, as well as short notes on the habitat of the new species and comments on other semiaquatic millipedes with modified mouthparts.

Adventure tourism is a specific type of tourism that has been increasingly popular in Serbia in recent years. In this regard, the paper identifies the basic characteristics of adventure tourism, its development in Serbia, with a great emphasis placed on high mountain areas that, owing to their physical and geographic characteristics, possess huge potential. The paper aims, among other things, to identify factors encouraging or limiting development of adventure tourism in Serbia, analysing the practice, defining potential destinations and suggesting appropriate measures in order to promote it

According to its characteristics the deposit of thermal waters in Mačva is of world significance. The reservoir consists of the karstified Triassic limestone and dolomites where the water temperature of about 100ºC is expected. These phenomena were registered in Dubalj, Bogatić, Mačvanski Pričinović, Belotić, Metković and Klenj. There are real prerequisites for Mačva to become 'the hydro-geothermal region' with intensive exploitation of water. Present assessment shows that geothermal energy from thermal waters, exploited near Bogatic, could utilized in intensive agri and aqva cultural production of whole Macva, especially organic food according to restri word ecologic standards, as well as heating of Bogatic, Sabac, Loznica and Sremska Mitrovica.

The research included trends in water temperature of the Danube River at Bogojevo gauge and surface air temperature at the nearby meteorological station Sombor, as well as an analysis of the results obtained in relation to the claims of the existence of the hiatus in global air temperature increase in the period 1998-2012. In the period 1961-2013, there was a statistically significant increase in the mean annual water temperature (0.039?C/year), as well as all the average monthly values. However, with annual values for the period 1998-2013, there was a decrease. The longest periods of negative trend (27 years) were recorded for January and February. A high correlation was found between the surface air temperature and water temperature for all monthly and seasonal values. In the mean annual air temperature the presence of the hiatus is not observed, but a negative trend is recorded in March (32 years), December (43 years) and February (49 years). The highest correlations between water temperature and North Atlantic Oscillation (NAO), Arctic Oscillation (AO) and Atlantic Multidecadal Oscillation (AMO) were obtained for the NAO in January (0.60), the AMO in autumn (0.52) and the NAO in winter (0.51). For surface air temperature, the highest correlations were registered for the AMO in summer (0.49) and the NAO in winter (0.42). The results indicate the dominant role of natural factors in the decrease of winter air temperature and water temperature of the Danube.

Climate is one of the main factors for the development of recreational forms of tourism in Montenegro. It affects the temporal arrangement and spatial distribution of tourists throughout the year. It determines the context of the environment in which the activities of tourists take place and represents the tourism resources. It is important for the planning and construction of tourism facilities and infrastructure, as well as the organization of tourism activities. This paper presents the tourism climatic index as a bioclimatic indicator for determining the conditions suitable for recreational tourism throughout the year. Research results according to the case study indicate the comparative advantages and also the lack of climate as the resource in tourism of Montenegro. There is an apparent underutilization of periods with climate conditions that work in favour of recreational forms of tourism. The uneven spatial and temporal arrangement of suitable climatic conditions in the tourist centres is the factor of the formation of seasonality of tourism trends. However, the results of linear correlation of tourism climatic index and monthly visits point to the incompatibility of potentials with capacity utilization. [Projekat Ministarstva nauke Republike Srbije, br. 176008