* The Wolf Trap Opera Company and the National Symphony Orchestra join forces in a concert staging of "La Boheme" Friday at 8:15 at Wolf Trap Park, 1551 Trap Rd., Vienna. Puccini's story of young love and tragic loss among struggling Parisian artists will be sung in Italian with English supertitles. (The 1896 classic has become known more recently as the inspiration for Broadway's "Rent.") Stephen Lord conducts. Tickets cost $32 to $45 in the Filene Center, $20 on the lawn, from Tickets.com. To order, call 703-218-6500 (service charges added); for information, call 703-255-1860.
* Opera International performs Poulenc's "Dialogues of the Carmelites" Friday at 7:30 and Sunday at 4 at Lisner Auditorium, 730 21st St. NW (Metro: Foggy Bottom-GWU). The opera, sung in English, portrays the lethal impact of the French Revolution on the nuns in a Paris convent. Tickets cost $30 to $50, students $20, from Ticketmaster. To order, call 202-397-7328 (service charges added); for information, call 301-365-3479.
In conjunction with its "Baseball in America" exhibition, the Smithsonian's National Museum of Natural History is hosting a "Baseball Blast Family Festival" Saturday from 10:30 to 4. Drop-in activities include stage and musical performances, book signings by authors, photo sessions with minor league team mascots, a display showing how a baseball bat is produced and hot dogs from seven major-league ballparks across the country. Admission is free. The museum is at 10th Street and Constitution Avenue NW (Metro: Smithsonian, Federal Triangle). Call 202-633-1000 (TDD: 202-357-1729).
Don't Expect Dinosaurs
Help archaeologists reveal the past and identify artifacts during Tidewater Archaeology Weekend Saturday and Sunday from 10 to 4 at Historic St. Mary's City, first settled in 1634 and the site of Maryland's first capital, about 60 miles south of the Beltway on Route 5 in St. Mary's County. There will also be living history portrayals, tours of a replica 17th-century tall ship and other exhibits, walking tours of the Town Center and activities for children. Admission is $7.50, seniors and students $6, ages 6 to 12 $3.50, younger free. Call 800-762-1634 or 240-895-4990.
Enjoy an outdoor evening of free music by local favorites at the 18th annual Crosstown Jam sponsored by the Washington Area Music Association, Sunday from 4 to 11 at Carter Barron Amphitheatre, in Rock Creek Park at 16th Street and Colorado Avenue NW. The lineup includes Tom Principato, Ski Johnson, the Sweet Heaven Kings, Katy Benko, Johnny Castle's Thrillbillys and the Carlsonics. No tickets are needed. Call 202-338-1134 or 202-426-0486.
NSO House Gets Naked
Explore the 2004 National Symphony Orchestra Decorators' Show House before 33 designers and decorators get their hands on it at Bare Bones Days Saturday and Sunday from noon to 5. Chateau Peyrenc de Moras, the 13,000-square-foot house at 9121 River Rd. in Potomac, was styled after the Rodin Museum in Paris and completed in 1983. Admission is $5 at the door, under age 8 free. Potential prodigies may visit a musical instrument "petting zoo." Free parking will be provided at the site. The transformed Show House will be open Oct. 3-31 in this annual benefit for the orchestra. Call 202-416-8149.
Sounds of an Ancient Land
In its first visit to the United States, the Arab-Israeli Orchestra of Nazareth performs classical and folk music of the Middle East on traditional instruments Saturday at 8:30 in Gaston Hall, in the Healy Building on the Georgetown University campus, 37th and O streets NW. Chanteuse Lubna Salameh sings with the orchestra. The concert is co-sponsored by the Embassy of Israel, the Middle East Institute, Theater J and other organizations. Tickets cost $25, students and seniors $10. Call 202-687-3838.
'Tempest' Swirls in Arlington
The Washington Shakespeare Company opens its production of "The Tempest," thought to be Shakespeare's final play, with "pay-what-you-can" previews Thursday, Aug. 6-7 and Aug. 9 at 8 at the Clark Street Playhouse, 601 S. Clark St., Arlington (Metro: Crystal City). In "The Tempest," the Duke of Naples and his court are shipwrecked on an island commanded by Prospero, once the Duke of Milan, and his magical powers. The bargain seats go on sale at the box office 30 minutes before each show. Performances continue through Sept. 4; regular prices are $22 to $30. Call 703-418-4808.
-- Compiled by Barry Barriere