The programme for the promenade concert at Mechanics' Hall, tonight, will be as follows: 1.  March, "The Twentieth Century," (First time).  M. Fall. 2.  Waltz, "Arabian Nights,"  Strauss. 3.  Overture, "Le Roi d'Ys,"  Lalo. 4.  Selection from "La Fille de Madame Angot,"  Lecocq. 5.  Habanera, (First time).  Chabrier. 6.  Prologue to "Pagliacci,"  Leoncavallo. 7.  Waltz, "Vienna Beauties,"  Ziehrer. 8.  Polonaise, (First time).  Liadow. 9.  Waltz, "Champagne Dreams," (First time).  Vollstedt. 10.  Serenata,  Moszkowski. 11.  Polka, "Love Letter,"  Ziehrer. 12.  Military March,  Zach.