Richard C. Snyder Jr., 32, a sixth-grade teacher at St. Albans School for Boys who was active in the Boy Scouts of America, was fatally injured Wednesday in an autombile accident near Charles Town, W.Va.

A West Virginia State Police spokesman said the accident occurred when Mr. Snyder's vehicle, which was traveling east on Rte. 340 near Charles Town, was struck head-on by another automobile.

Police said Mr. Snyder, who was on vacation at the time, was pronounced dead at Jefferson Memorial Hospital in Ranson, W.Va. A passenger in his car was treated for minor injuries at the hospital and released.

Police said the driver of the other car, who had left the scene on foot, was later arrested and charged with negligent homicide in connection with the incident.

Mr. Snyder was born in West Point N.Y. He moved to this area with his family about 20 years ago and graduated from St. Stephen's Episcopal Day School for Boys in Alexandria.

A veteran of the Vietnam conflict, he served in the Air Force from 1968 to 1972.

After earning a bachelor's degree in English from University of Richmond in Virginia in 1978, he joined the St. Albans faculty.

Mr. Snyder, who lived in Washington, was an assistant scoutmaster and a chapter chief of the Alexandria chapter of the Order of the Arrow of the Boys Scouts of America. He was active in the St. Stephen's school alumni association.

Survivors include his parents, retired Air Force Col. Richard C. and Frances P. Snyder, and three brothers, Peter P., Bruce D. and Stephen S., all of Alexandria.

The family suggests that expressions of sympathy be in the form of contriubtions to the Boys Scouts of Amrica.