James Mackey IV, 17, a student at Gonzaga College High School, has been selected for the honors group of the 41st Annual Westinghouse Science Talent Search, a national competition funded since 1942 by the Westinghouse Educational Foundation and the Westinghouse Electric Corp., and conducted by Science Service, a nonprofit organization. The program is designed to encourage young scientists.

Three hundred high school seniors were selected for the honors group on the basis of their independent scientific research projects. About 1,000 students in the United States, Puerto Rico and American schools overseas submitted projects. Talent Search sponsors will recommend honors group members for admission and financial aid at colleges and universities.

Stephanie Ann Telesetsky, 16, a student at Stone Ridge School in Bethesda, was selected from members of the honors group as one of 40 top winners in the Talent Search. The winners are meeting today through March 1 in Washington with leading scientists. They will divide $89,500 in educational grants.

Seven Metro employes whose inventions are saving taxpayers more than $74,000 a year in transit operating costs have received awards from the Washington Metropolitan Area Transit Authority.

The inventions include new tools, valves and assemblies designed to make buses, trains or fare collection equipment run more smoothly. The awards were made under a three-year-old program in which the transit authority presents 10 percent of the annual cost savings--up to $1,000--to persons whose suggestions result in operating efficiencies and cost savings.

Winners are Christine Getek of A Street NE; Michael Starkey of Wheaton; Edgar Hiller of Crofton; James Miller, a former Metro employe who lives in France; Kenneth Toy of Fairfax County; Ennis Meadows of Alexandria; and Charles Russo of Burke.