Since the discovery of the European chafer, Amphimallon majalis (Razoumowsky), in Newark (Wayne County), New York during 1940, this serious insect pest of lawns has spread to many areas of the State (Fig. 1). Isolated infestations occur in the adjoining and nearby states of Connecticut, Massachusetts, New Jersey, Ohio, Pennsylvania, and Rhode Island. It is present also in the Canadian province of Ontario along the Niagara frontier.