NEW DATA ON GENUS NIPHARGUS SCHIÖDTE, 1849 (FAM. NIPHARGIDAE) FROM ITALY AND MACEDONIA (CONTRIBUTION TO THE KNOWLEDGE OF THE AMPHIPODA 272)

Two members of the genus Niphargus Schiödte, 1849 (Family Niphargidae) are treated. The species Niphargus orbis, sp. n. is described and figured from the subterranean waters of the springs in Rio di Valle, Alpi Ligure, Italy, previously mentioned (1993) under the name of N. rhenorhodanensis Schellenberg, 1937 from the same locality. The differences between both species are analysed. The species Niphargus osogovensis S. Karaman, 1959, known and partially described from the springs in Osogovo Mountain in Macedonia, is redescribed and figured more in detail from the type- locality based on typical material, and the taxonomical position of this species within the genus Niphargus is discussed.