The Folk Arts Program at the National Endowment for the Arts has distributed its second annual National Heritage Fellowships. So far, thirty-one individuals have been singled out tor national recognition as "exemplary master folk artists and artisans," and honored for their "authenticity, excellence and significance within a particular artistic tradition," and for their ''ongoing artistic accomplishment." The art forms of these master folk artists have ranged from duck decoy carving to quilting, from ballad singing to bagpipe playing, from storytelling to Afro-Puerto Rican homha dancing. The artists have come from all sections of the nation