Alan Stone, 95, a retired Department of Agriculture entomologist who specialized in the study of two-wing flies, died March 4 at a nursing home in Durham, N.C., after a stroke.

For 40 years until his retirement in 1971, Dr. Stone was a systematic entomologist for the Agriculture Department, meaning he dealt with the description and classification of new species of flies.

He authored or coauthored more than 100 scientific papers relating to his area of specialty that included mosquitoes, horseflies, black flies and fruit flies.

During World War II, he conducted studies on flies of the South Pacific, helping determine which ones were more likely to carry diseases.

He was born in Brooklyn, N.Y. He was a graduate of Cornell University, where he received a Ph.D. in entomology, and he was an instructor of entomology at Dartmouth College for a couple of years.

He was a member of the Entomological Society of America, the Washington Entomological Society, the American Mosquito Control Association and the Cosmos Club.

His wife of 61 years, Louise B. Stone, died in 1990. Survivors include his son, Peter Stone of Chapel Hill, N.C., and two granddaughters.

Maxine A. Powell Pilkington


Maxine Adelle Powell Pilkington, 80, a florist who had worked for Conklyn's Florist in Alexandria since 1973, died of lymphoma Feb. 22 at Inova Mount Vernon Hospital. She lived in Alexandria.

Mrs. Pilkington was born in Stanardsville, Va. She attended American University.

In Alexandria, she was a school worker and volunteer, a Welcome Wagon representative and a saleswoman for her family's printing business, Accurate Press. She was a member of Calvary Presbyterian Church.

Her husband of 42 years, Daniel J. Pilkington, died in 1983. Survivors include five children, Patricia Dement of Silver Spring, Daniel J. Pilkington of Castleton, Va., Adele Butler of Reston, and Charles Pilkington and Dawn Pilkington, both of Alexandria; two brothers, Roy Powell and Randolph Powell, both of Stanardsville; 10 grandchildren; and five great-grandchildren.

John Charles Tickerhoff


John Charles Tickerhoff, 87, who delivered milk to homes in the Washington area for 32 years before retiring in 1976, died of a lung ailment March 4 at Hospice of Northern Virginia.

Mr. Tickerhoff, an Arlington resident, delivered for Sealtest Dairy in the District and Montgomery County.

He was born in Portage, Pa., and was raised in Johnstown, Pa. He served in the Merchant Marine during World War II and was assigned to convoy transport ships.

He was a member of St. Agnes Catholic Church in Arlington.

His wife of 48 years, Pauline B. Tickerhoff, died in 1991. Survivors include a son, Ronald W. Tickerhoff of Arlington; two sisters; and two step-grandchildren.

Julia Geaghan Sheehan

Church Member

Julia Geaghan Sheehan, 81, a member of the Altar Society at St. John's Catholic Church in McLean, where she lived for about 50 years, died March 5 at the Arleigh Burke Pavilion. She had congestive heart failure.

Mrs. Sheehan was born in Galway, Ireland, and was raised in Bangor, Maine. She moved to the Washington area in 1944 to work as a secretary at the War Department.

Her husband of 50 years, Dr. John W. Sheehan, died in 1994.

Survivors include four children, Mary Patricia Frank of Falls Church, Kathleen O'Donoghue of Bethesda, Mark Sheehan of Woodbridge and John Sheehan of St. Louis; two sisters; two brothers; and 10 grandchildren.