The Indians in this Territory, with the exception of the Sioux and Northern Arapahoes and Cheyennes, mentioned under the heads of Dakota and Montana respectively, are the eastern band of Shoshones, numbering about 1,000. The Shoshones are native to the country. Their reservation in the Wind River Valley, containing 2,688,000 acres, was set apart for them by treaty of 1868. But little advancement in civilization has been made by these Indians, owing to their indisposition to labor for a living, and to the incessant incursions into their country of the Sioux and the Northern Arapahoes and Cheyennes, with which tribes they have for many years been at war. The losses sustained from these incursions, and the dread which they inspire, tend to make the Shoshones unsettled, and unwilling to remain continuously on the reservation. They therefore spend most of the year in roaming and hunting when they should be at work tilling the soil and improving their lands. There is one school at the agency, having an attendance of ten scholars, in charge of an Episcopal missionary as teacher. IDAHO. The Indian tribes in Idaho are the Nez Perces, the Boise and Bruneau Shoshones, and Bannocks, the Coeur d'Alenes, and Spokanes, with several other small bands, numbering in the aggregate about 5,800 souls. _Nez Perces._--The Nez Perces number 2,807, and have a reservation of 1,344,000 acres in the northern part of the Territory. By treaties of 1855 and 1863, they ceded to the United States a large body of land lying within the limits of the then Territories of Oregon and Washington, and accepted their present diminished reservation, with certain annuities in consideration of the cession of the remainder. The tribe has long been divided into factions known as the "treaty" party and the "non-treaty" party, from disagreements arising out of the treaty made with them in 1863. Though the ill feeling engendered has in a measure subsided, the "non-treaty" Indians, to the number of a few hundred, still stand apart and accept no favors from the government. These, with few exceptions, reside outside the reservation, on Snake River and its tributaries, and cause more or less trouble in a petty way to the white settlers. The Nez Perces generally have for many years been friendly to the whites, are quite extensively engaged in agriculture, and may be considered well advanced in civilization. They show considerable interest in the education of their children, and have two schools in operation, with an attendance of 124 scholars.