Dr. and Mrs. James Putney of Chapel Hill are delighted to announce the engagement of their daughter, Katharine, to Michael Ellis, son of Mr. and Mrs. Edward Ellis of Toledo, Ohio. The bride-elect is a graduate of Chapel Hill High School and received a bachelor's degree in biology from Earlham College. She is currently a doctoral candidate in Plant Biology at the University of Georgia. The groom-elect is a graduate of St. Francis de Sales High School in Toledo, Ohio, and received a bachelor's degree in Biology from Earlham College. He is currently a doctoral candidate in Biochemistry, also at the University of Georgia. No date has been set.