Omaha, Neb., Feb. 9. — Official letters from the commanding officer of Sidney Barracks reports that Pawnee Killer and Two Lances, accompanied by ninety-three lodges of Whistler’s band of Sioux and two of the Brule band, have left the reservation, and are moving to the hunting grounds south of the Platte, by way of Lewis Canon. They claimed that they bad the verbal permission of the Agent to do so. Two Lances reported two other bands near Lewis Canon, one of twenty-five lodges of Arrapahoes, and another of some fifteen warriors, after the Utes, who had a few days previous stolen a largo number of horses from there. There is no question but that the Indians are highly incensed at the treatment.