In the opinion-page article "Subtle Erosion of America's Uniqueness," June 26, the author writes: "The 'melting pot' concept is under pressure from those who would emphasize ethnic identity over integration."The author becomes, however, one of those very people when he uses the term "African-American." This moniker is just such an example of the attitude he supposedly opposes, yet he still feels obligated to be "correct." Michael Pupis, Newton Square, Pa. Letters are welcome. Only a selection can be published, subject to condensation, and none acknowledged. Please address them to "Readers Write," One Norway St., Boston, MA 02115.