Frederick W. Whittemore, 66, an entomologist with the Agency for International Development and a retired Army colonel, died at Fairfax Hospital Aug. 27 following a heart attack.

Dr. Whittemore, who lived in Fairfax, was born in Boston, Mass. He graduated from Massachusetts State College and earned a doctorate in entomology at Johns Hopkins University in 1948.

He entered the Army in 1941 and served in North Africa during World War II. He later took part in the occupation of Germany and then was an entomologist at various military posts in this country. He was stationed at Fort Sam Houston in San Antonio, Tex., when he retired in 1962. His military decorations include the Bronze Star Medal.

For the next several years, Dr. Whittemore worked with the Pan American Health Organization in El Salvador and the U.N. Food and Agriculture Organization in Rome.

In 1973, he moved to the Washington area and joined the Environmental Protection Agency. In 1976, he transferred to AID and remained there until his death.

Dr. Whittemore was a member of the Entomological Society of America and the American Mosquito Control Association. He published numerous articles in professional journals.

Survivors include his wife, Charlotte of Fairfax; three children, Samuel W., a Marine Corps lieutenant who is stationed at Camp LeJeune, N.C., Helen F. Dow of Virginia Beach, Va., and Mary L. Stephenson of Cotulla, Tex.; two sisters, Priscilla Elliott of Saratoga Springs, N.Y., and Helenie Anderson of Roslindale, Mass., and four grandchildren.