Miss Mary Katherine Bormann, age 16 years, of Rt. 2, died Sunday at her home.  Survivors: Parents, Mr. and Mrs. Emil R. Bormann, sisters, Miss Shirley Ann and Miss Betty Ann Bormann; grandparents, Mrs. D. Bormann and Mr. and Mrs. O. E. Phillips.  Rosary will be at 7:30 o'clock Tuesday evening in the Riebe Chapel.  Requiem Mass at 9 o'clock Wednesday morning in Our Lady of Guadalupe Catholic Church in Helotes, Texas.  Arrangements with