For the first time in nearly a century, the Metropolitan Opera stages a performance in Spanish, "Florencia en el Amazonas," a magical realist telling of an opera diva's journey to South America to find her long lost lover, a butterfly hunter who disappeared in the jungle. "It's a dream come true to be able to have Latinos and sing in Spanish," says Gabriella Reyes who interprets "Rosalba" in the opera, as the company continues its bid to expand its appeal to wider audiences. IMAGES AND SOUNDBITES