Professor Morse's well-known “Manual” treats of the orthopterous fauna of Massachusetts in general, but of the eastern maritime area in particular. The region extending from the Worcester Plateau to the New York State Line includes a variety of environment which apparently have not been examined from the standpoint of Orthoptera nearly as thoroughly as the eastern half of the state. The present list of Acrididae is the result of collections made by the writer chiefly at Cummington and about Amherst, during the past three years. Like our native ferns,grasshoppers arc usual1y found amid surroundings suited to the ecological complex of the particular species concerned. Mention of some differences shown by the Life Zones of western Massachusetts may be helpful in understanding the distributional factors of local Acrididae.