Mae Evans Harris Giddings, 74, a Washington artist and writer who was a former president of the District Branch of the National League of American Pen Women, died of congestive heart failure Monday at Sibley Memorial Hospital.

She had won awards for her oils, pastels and watercolors. Her work was exhibited at the Art Club of Washington, the Cosmos Club and American University.

Mrs. Giddings exhibited china painting and lectured on the subject at American University. She was commissioned in 1954 by Queen Juliana of The Netherlands to paint a tea set. Former First Lady Bess Truman also had purchased china painted by Mrs. Giddings.

During World War II, Mrs. Giddings worked as a Red Cross volunteer at Walter Reed Army Hospital where she gave classes in painting.

She had been president of the Women's Society of Christian Service of the Methodist Church in Washington where she had served as chairman of the ways and means committee.

Mrs. Giddings was a native of Mount Carmel, Pa. She attended American University and later was elected president of the Women's Guild at American University.

She had helped raise money for a number of charities along Embassy Row and for Sibley Memorial Hospital, where she was an honorary life member of the hospital guild.

She was a resident of Washington.

Her first husband, Dr. Wesley K. Harris, died in 1973.

Mrs Giddings is survived by her second husband; two sons, Douglas R. Harris of Davenport, Iowa, and Dr. Wesley K. Jr., of Washington; a daughter by her first marriage, Judith M. Chiles of Pittsburgh; four grandchildren, and one great-grandchild.