S. arctica is a northern species. In the southern part of its range it occurs only in the mountains and in the lowland peatbogs (R.R. ASKEW, 1988, The dragonflies of Europe. Harley, Colchester). In Poland it is one of the rarest dragonflies; so far it has been found in the Carpathians, in the Sudeten Mountains, in Silesia, and in the Wolin Island (J. MUSIAL, 1979, Notul. odonatol. I: 42-44). The Janowskie Forests is a big sylvan area at the border of the Lubelska Uplands, Roztocze and the Sandomierska Basin, 170-230 m a.s.l. The region is rich on small, inter-sylvan sphagnal peatbogs, where acid, weakly mineralised water reservoirs occur (pH 3.39-5.89, conductivity 31- -156 S/cm). As it appears, these are greatly advantageous to S. arctica', out of the 7 peatbogs examined during 1995-1997,1 found the species on 4 of them, i.e. inGwizdów (UTM: EB81; 22°14’E, 50°40’N), Dçbowiec (EB81; 22°I5’E 50°39’N), Boreczki (FB10; 22°37’E, 50°38’N) and at Kolonia Sokotówka (FB10; 22°40’E, 50°38’N). The nearest known site of 5. arctica is some 220 km to the W (E. SCHOLZ, 1910, Jh. Ver. schles. Insekten. 3: IX) and 230 km to the SW (J. ZAÓWILICHOWSKI. 1932, Spraw. Kom. fizjograf., Krakow 66: 77- -80).