Retired Air Force Lt. Gen. Earl. W. Barnes, 76, who led a fighter command in World War II and who later was an official of the Central Intelligence Agency, died of emphysema Wednesday at his home in McLean.

Gen. Barnes commanded the 1oth fighter command of the 13th Air Force in the South Pacific during World War II. The 13th Air Force participated in the Solomon Islands and Philippine campaigns. He was awarded the Distinguished Service Medal.

During the late 1940s and early 1950s, he worked in the Pentagon's weapons systems evaluation group, then was chief of staff of the United Nations Far East Command air forces in Tokyo before retiring in 1957.

Gen. Barnes later became a member of the CIA's national estimates board. He retired from the agency in 1971 and was awarded the Distinguished intelligence Medal.

In later years he did volunteer work for the Smithsonian Institution's Air and Space Museum.

Gen. Barnes was a native of Alliance, Neb., and a 1925 graduate of the Military Academy at West Point.

He is survivied by his wife, the former Ruth M. Townsend, of the home; a son, Daniel, of Radnor, Pa.; a sister, Dorothy Morison, of Crawford, Neb., and three grandchildren.