Tonight's program at the Pop Concert in Symphony Hall is as follows: 1.  March, "The Continentals,"  Brooke 2.  Overture, "The Italians in Algiers,"  Rossini 3.  Selection, "Cavalleria Rusticana,"  Mascagni 4.  Fete Boheme from "Scenes Pittoresques."  Massenet 5.  Overture, "Mignon,"  Thomas 6.  (a) Le Bois sacre from "Roma,"  Massenet (b) Danse basque,  Chauvet 7.  Hungarian Rhapsody,  No. 2, Liszt 8.  Finale, "Lohengrin,"  Wagner 9.  Selection, "Faust,"  Gounod 10.  Ave Maria,  Schubert 'Cello, Mr. Keller. Harp, Mr. Schuecker. Organ, Mr. Marshall. 11.  Waltz, "Morning Journals,"  Strauss 12.  March, "Hans Richter,"  Schrammel