By using morphometric data of grasshoppers(length of tegmen,length of post femur,length of post tibia)of Xilin Gol River Basin Region of Inner Mongolia,China(which is situated at N 43°26′～44°08′and E116°04′～117°05′),we analysed the dispersal ability(flying)of grasshoppers.The results showed that the dispersal ability of 23 species of grasshoppers was increasing as following Female:Mongolotettix japonicus vittatus(Uv.)→Chorthippus fallax(Zub.)→Haplotropis brunneriana Sauss.→Ch.hammastroemi(Mir.)→Aero...