Abstract: Chrysacris jiamusi sp.nov. of the family Acrididae fr om China(Heilongjiang Province) is described. The type specimens are deposited I n Department of Biology， Northeast Normal University. This new species resembl es Ch.qinlingensis Zheng and Ch.liaoningensis Zheng, but can distinguished by the following characters:1)the vertical diameter of eyes in male 127～133 times the length of subocular suture;2) the greatest width of costa area in mal e 2.25 times the median area; 3)the greatest width of costa area in female 1.8 ～2.0 times the median area;4)the length of the space between the lateral lobes of mesosternum about 1.67～1.75 times the narrowest width in male. Length of body ♂ 15.6～18.5 mm，♀ 23.2～24.2 mm；length of pronotum ♂ 3.5～3.9 mm，♀ 4.3～4.8 mm；length of elytra ♂ 16.5～17.0 mm，♀ 18.1～19.5 mm；length of hind femur ♂ 9.9～11.3 mm，♀ 12.3～13.3 mm. Holotype ♂,Jiamusi, Heilongjiang Province, 1957Ⅶ15. Paraty pes: 3 ♀♀, the same as holotype; 1 ♂, 1 ♀, Acheng, Heilongji ang Province, 1957Ⅶ24; 1 ♂, 1 ♀, Shenshu, Heilongjiang Pr ovince, 1957Ⅶ30, collected by DU JunLing.

Key words: Orthoptera, Acridoidea； Chorthippus; new specie s, China, Orthoptera, Acridoidea, Chrysacris; new species, China