Theodis Thompson, a former Howard University professor, pleaded guilty yesterday to interstate transportation of a forged security in connection with a scheme in which a government prosecutor said Thompson stole $9,200 in student grants.

Thompson, who was chairman of Howard's health services administration department until earlier this year, deposited 12 checks intended for seven students in his own checking account at the Citizens Bank & Trust Co. of Maryland in Riverdale, according to Assistant U.S Attorney Stephen R. Spivack.

The prosecutor told U.S District Court Judge Louis F. Oberdorfer that checks were mostly made out to students who no longer were entitled to recive the federal grants. Spivack said that Howard officals started investigating when students received notices that they had been paid the notices that they had been paid the money, when they knew they had not.

The 34-year-old Thompson, now an associate professor at the University of Southern California, pleaded guilty to a criminal information charging the illegal interstate transportation of a forged $1,000 check in 1976 that was intended for a former Howard student.

Oberdorfer set sentencing for Jan. 19. Thompson faces up to a 10-year prison term, a $10,000 fine or both.