Susan Hendl and Michael Steele. Photo by Martha Swope, 1968. "Last night at the State Theater the New York City Ballet: presented George Balanchine's 'Metastaseis & Pithoprakta,' which fortunately you don't have to be able to pronounce to enjoy. "Unlike most choreographers who find the pattern of movement the most difficult part of a ballet, Mr. Balanchine gets: hung up on titles. This most recent and startling work takes its name from the two pieces of music by lannis Xenaki