-13 spp, were collected in S Yakutia at the towns of Aldan and Tommot. Most of them were confined to peat-moss bogs with open larch stand (loc. ‘mari’) on terraces of the major Aldan R., while the main area of the Aldan Upland seems to be almost devoid of Odon.. The record of the only rheophilic sp. found, Nihonogomphus ruptus (although not its northernmost record), and of a northern boreal sp. Somatochlora sahlbergi are new for Yakutia. A list of 32 spp. presently known for Yakutia is given.