Dr. Serge Koussevitzky will conduct the Boston Symphony Orchestra in a concert to be held Thursday evening at 8 o'clock in Sanders Theatre. The program will include Haydns Symphony in G. Major, No. 88, Debussy's "La Mer," and Rachmaninoff's Symphony in E minor, No. 2, Opus 27. Further particulars may be obtained by inquiring at the University News Office in University Hall.