Allatius, or ALLACCI, LEO, wrote a treatise on the melodies of the Greeks. He died at Rome in 1669. He was a professor of Greek, and principal inspector of the library of the Vatican. He had a great facility in copying Greek manuscripts, and, it is said, was so much grieved as to have wept on wearing out the only pen which he had used in copying during the space of forty years. Allatius was also the author of a useful catalogue of dramatic pieces up to the year 1667, entitled the " Drammaturgia."