part, only sufficient to give it a certain local colour. It was the task of both composer and singer to make the aria fit in to the drama; but the claims of the vocalist were paramount in its composition. As the canons of operatic construction became more and more strictly defined, distinctions arose between different kinds of arie, each having its own character and form; the _aria cantabile_ was for sentimental declamation, _di portamento_ for long drawn-out tones, _di mezzo carattere_ for dramatic expression, _aria parlante_ or _agitata_ for the expression of passion, _aria di bravura (agilità)_ for the display of artistic skill of every kind.[14] The poet and composer had only to be careful to suit the arie to the performers, and so to distribute them through the opera that their variety should place the performances of each character in their most favourable light.[15] But a certain fixed form served as a groundwork to all arie, and kept them within well-defined bounds. It is easy to trace the simple expressive phrase as it is extended and rounded into a well-formed melody, and then to follow the different subjects so obtained until, by progressions and interludes, they are welded into a whole. But this led to a petrifying formalism, and to a tedious lengthening of the aria, which sacrificed character to vocal display. An aria regularly consists of two parts differing in key, time, and measure. An allegro in common time usually begins, introduced by a slower passage in triple time; but as to this there is no fixed rule, and free scope as to details is given to the composer. The first movement is broadly conceived, always with a view to the skill of the performer; he repeats one or more of the principal melodies in different positions, but without thematic elaboration, and inserts runs and passages. In the second part the composer, granting some repose to the singer, made a display of his own art by selected harmonies, elaborate accompaniments, and so forth. It was {THE ARIA.} (163) essential to the singer's reputation as an artist that he should be able to vary the modulation and embellishment of the melody each time it recurred, the composer supplying a mere outline, and leaving the execution of the cadenzas entirely to the discretion of the performer. This task became more difficult as the custom grew of repeating the whole of the first part at the close of the second, thus turning the latter into a middle movement; for no singer would be deterred from enhancing the interest of each repetition by a fresh mode of delivery. So that the public performers of that day displayed their taste and cultivation not only, as at present, by execution and declamation; they worked of necessity side by side with the composer, whose special glory it was to inspire his singers with a spark of his own creative genius.