The Merriweather Post Pavilion announced part of its summer schedule yesterday. The summer will kick off with a five-day run of Doug Henning's "World of Magic" (June 9-13) before settling in to the one- or two-day stands by major music acts.

Among the major concerts: the returns of Crosby, Stills and Nash (Aug. 5, 6) and Steve Miller (date to be announced); Elton John teamed with hot newcomers Quarterflash (July 22); Las Vegas crooner Wayne Newton (date to be settled); the first major local concerts for Loverboy (July 10) and heartthrob Rick Springfield (Aug. 22); the reconstituted King Crimson (July 29) and the first supergroup of the '80s, Asia (June 21). Lena Horne may also play the Pavilion, though she is still scheduled for a five-night run at Wolf Trap; ironically, the Nederlander Corp., which books the Pavilion, is coproducer of her Broadway show and owns the theater Horne is currently performing in. The only other switch-over from Wolf Trap is Lou Rawls (July 20).

Dates have yet to be announced, but the Post Pavilion is a strong contender for the reunion tours of Simon and Garfunkel and the Temptations (separate bills, please). Other strong possibilities for acts touring this summer include Dan Fogelberg, Willie Nelson, Tom Petty, Christopher Cross, Queen, the Go-Go's and Joan Jett. Some of those acts may opt for the larger seating capacity of the Capital Centre. The Cap Centre should also host Heart, Van Halen, Judas Priest and Styx.

The Pavilion's summer series includes many familiar faces: Kenny Loggins (Sept. 2, 3), Jimmy Buffett (July 2, 3), James Taylor and Santana (both dates to be announced), Chicago (June 26), Marshall Tucker (June 26), Air Supply (July 21), George Benson (July 25), Al Jarreau (Aug. 13), Charlie Daniels (Aug. 29) and Bonnie Raitt (July 8).

The Post Pavilion, which also announced that its lawn seating has been built up to a 25 percent angle to provide better sightlines, has more country-oriented shows than in previous years, with Ronnie Milsap (July 18), Eddie Rabbitt (Aug. 1), Barbara Mandrell (Aug. 21) and Emmylou Harris (Aug. 27). The Mandrell show is only one week after the Country Music Entertainer of the Year headlines the Bull Run Country Jamboree at Bull Run Regional Park in Fairfax with Ronnie McDowell, John Anderson and Ricky Skaggs. The park has another major country show slated for July 25 with Loretta Lynn, Bill "Crash" Craddock, Dave & Sugar, Gail Davies and Lee Greenwood.

The 4,200-seat Carter Barron Amphitheatre will continue the series of free weekend programs it began last year. A spokesman said the programming will run the gamut from jazz, rock, R'n'B and gospel to symphonies and a Gilbert and Sullivan weekend. The National Park Service will sponsor the season, which will run from the last week in June through Labor Day.

The Park Service may also be involved in the event of the summer, the annual Fourth of July concert that precedes the fireworks on the Mall. Apparently, the Beach Boys will not return for the third year in a row. Rumored replacement? Kenny Rogers and Kim Carnes.