A brief report is made on the observations and experiments conducted in Louisiana and northward through the Mississippi Valley relating to the seasonal habits of the spotted cucumber beetle, Diabrotica duodecimpunctata Fabr. According to the information obtained, this species regularly migrates northward during the spring and early summer and the offspring migrate back to the South during the fall, with none surviving the winter north of central Missouri, and no true hibernation occurring in the South. The number of generations matured during this annual advance and retreat is not known.