KARYOTYPES AND LARVAL MORPHOLOGY OF THREE SPECIES OF MIDGES (DIPTERA, CHIRONOMIDAE) FROM THE LAKES IN SOUTHERN PART OF KUNASHIR ISLAND
Karyotypes of polytene chromosomes of three chironomid species from Kunashir Island (Far East, Russia) are described: <i>Nilothauma sasai</i> Adam et Saether, 1999 (2n = 8), <i>Demicryptochironomus</i> gr. <i>vulneratus</i> (Zett.) (2n = 6) from the Lagunnoe Lake and <i>Polypedilum (Uresipedilum)</i> gr. <i>cultellatum</i> Goetghebuer (2n = 8) from Lake Goryachee. Karyotypes with B-chromosomes were found among specimens of <i>N. sasai</i>. Larval morphology and karyotype with description of main markers are given for each species.