Ralph J.Matrozzo;77;of Fredericksburg;Va.;formerly of Belle Vernon;died Saturday;Dec.27;1997;at 6 p.m. in Georgetown University Hospital;Washington;D.C. Friends will be received Tuesday from 2 to 4 and 7 to 9 p.m. in the Ferguson Funeral Home Inc.;700 Broad Ave.;Belle Vernon;where a prayer service will be held Wednesday at 11 a.m.;followed by funeral Mass at 11:30 a.m. in St.Sebastian Church;Belle Vernon;with the Rev.John Cindric officiating. Burial will be in Belle Vernon Cemetery. The Ferguson Funeral Home Inc.is in charge of arrangements.