The New York Agricultural Excursionists returned to New York, August 25th, after an absence of five weeks, and a tour over 5,600 miles of Western territory. They were received with special honors at every place visited and great facilities were afforded for obtaining information. The note books of these correspondents are filled to the edge and from front to back with solid information, and we suppose that for three months to come the papers wilt be full of it. The Excursionists enjoyed a most delightful time, having visited in their tour, the Indian Territory, Missouri, Kansas, Colorado, the south part of the Rock; Mountains. Pike's Peak, Colorado Springs, Denver, Greeley, Laramie and Nebraska. One important point in the entire trip was demonstrated with distinctness, that deciduous aad evergreen trees can be grown on the dry prairies of far western Kansas without irrigation, and make as rapid a growth as in any other portion of the West. We shall soon have some notes on this subject.