The last of the Axelrod Quartet's Museum programs this season opens with Joseph Haydn's Quartet in C Major, Op. 50, No. 2. Béla Bartók's dark and introspective Sixth Quartet, in which at least a portion of each of the four movements is marked Mesto (sad, joyless, or rueful) concludes the first half. After intermission, the prize-winning Omer Quartet joins the Axelrod Quartet for an all-Stradivarius-and-Amati reading of Felix Mendelssohn's youthfully exuberant Octet in E-flat Major, Op. 20.