Museum memo.

• Position: WHAT'S NEW?

What's new in museums around the country? Among the more interesting exhibitions on view are:

Amorous Intrigues and Painterly Refinement: The Art of Frans Mieris, National Gallery of Art; Washington, D.C., through May 21.

Andy Warhol's Dream America. San Diego (Calif.) Museum of Art, June 17-Sept. 10.

David Hockney Portraits, Los Angeles County Museum of Art, June 11-Sept. 4.

Mary Poppins, The Art Museum of the University of Houston (Tex.), May 13-Aug. 5. Warriors of the Himalayas: Rediscovering the Arms and Armor of Tibet, The Metropolitan Museum of Art, New York, through July 2.

Impressionist Camera: Pictorial Photography in Europe, 1888-1918, Saint Louis (Mo.) Art Museum, through May 31.

Andrea Zittel: Small Liberties, Whitney Museum of American Art, New York...