A brief report on preliminary studies, during 1928, of leafhopper injury to legumes. Among the 15 species of Homoptera tested in cages on various legumes, only Empoasca fabae (Harris) caused the injury, which was serious on alfalfa, red clover, white clover, non-pubescent soybean, peanut, and sainfoin. The disease-like symptoms were not systemic: E. fabae free from the infectious principle has not been found to date. Plants not too badly injured always recovered their natural condition when the insects were removed.