A 17-year-old Washington youth was arraigned yesterday in a hit-and-run accident case in which an elementary school pupil was critically injured and his mother also was hurt when they were struck while crossing a street in Southeast Washington.

The youngster, Michael R. White, 10, of the 4800 block of Ashford Drive, Upper Marlboro, and his mother, Patty A. White, were heading for their car, in which Michael's father was waiting with other family members shortly after 6 p.m. Saturday. Michael had just had a haircut. As he and his mother crossed in the 2900 block of Minnesota Avenue SE, they were struck by a car that sped from the scene, according to court documents.

Fred A. Morgan of Morris Road SE was arraigned in D.C. Superior Court before Judge David L. Norman and charged with leaving after colliding.

A spokesman for D.C. General Hospital's intensive care unit said that Michael remained in critical condition yesterday with internal injuries. His mother, an employe of the U.S. Department of Housing and Urban Development, was treated for ankle injuries and released.

According to a court affidavit, police arrested Morgan after they got an anonymous phone call that a car matching the description of the one involved in the accident was in an alley near Bangor and Pitt streets SE. Police had found bits of broken headlight glass and remnants of a car grill at the accident scene, and said the car they found, which was registered to Morgan, had suffered damage that would have left such debris.

Morgan's trial is scheduled for Feb. 18. He was released on personal recognizance.