Waltham- Mr. Arthur R. Terrio of Waltham died Monday December 22, 2003 in Lawrence Memorial Hospital, Medford. He was 84. Born and raised in Waltham, Mr. Terrio was a Letter Carrier for the Raytheon Corporation where he worked until the age of 78. Mr. Terrio was a volunteer for the American Red Cross. Mr. Terrio was the husband of the late Nancy J. (Olds) Terrio, and brother of the late Mary Terrio and Patricia Conway. He is survived by one sister Alexandra Conway of Waltham, one nephew Dr. Laurence A. Conway of Milton and two nieces Jane V. Conway of Waltham and Melissa A. Conway of Nantucket. The Funeral Mass will be held Friday at 10:30 a.m. in Saint Marys Church 133 School Street, Waltham. Burial will be in Calvary Cemetery, Waltham. Visitation prior to the Mass from 9:15-10:15 a.m. in the Joyce Funeral Home, 245 Main Street (Rte. 20), Waltham. Donations in Mr. Terrios memory made to the New England Hemophilia Society, 347 Washington Street Suite 407 Dedham Ma 02026.