Dr. David Thomas McCulloch, 37, who recently completed a residency in plastic and reconstructive surgery at the Georgetown University School of Medicine, was killed in a traffic accident Jan. 30 near Tallahassee, Fla.

A spokesman for the Florida Highway Patrol said Dr. McCulloch and his wife, Shirley, were bicycling in the countryside, when Dr. McCulloch was struck by a passing truck. His wife was not injured.

Dr. McCulloch began his residency at Georgetown in 1978 and completed it as chief resident at the end of last year.He was establishing a private practice in plastic surgery in Tallahassee at the time of his death. He and his wife, the former Shirley Neely Ezell, a registered nurse at Suburban Hospital were married here last Dec. 27.

Dr. McCulloch was born in Durham, N.C. He graduated from Florida State University, where he was elected to Phi Beta Kappa, received his medical degree from Emory University and completed a residency in otolaryngology at the University of South Florida.

In addition to his wife, survivors include his parents, Dr. and Mrs. David J. McCulloch, a sister, Laura, and a stepdaughter, Denna Ezell, all of Tallahassee, and another sister, Ellen Styles of Summerville, S.C.

The family suggests that expressions of sympathy be in the form of contributions to the David Thomas McCulloch Memorial Fund of the Division of Plastic and Reconstructive Surgery at the Georgetown University Medical Center.