Ann Pesi;75;of 204 Long Ave.;Belle Vernon;died on Tuesday;Oct.13;1992;at 10 a.m.in Mon Valley Hospital.  She was born Jan.3;1917;in Washington Township;a daughter of the late John and Meri Podany Krofcheck.  She was a member of St.Sebastian Roman Catholic Church;and lived in the Belle Vernon area all of her life.  Survivors include her husband;Carl A.Pesi;with whom she celebrated 55 years of marriage on July 31;two sons;Carl L.Pesi of Belle Vernon and Thomas G.Pesi of Star Junction;two daughters;Mrs.Joan DeAngelis of Perry Twp. and Mrs.John (Patricia) Morigi of Belle Vernon;one brother;John Krofcheck of Coraopolis;three sisters;Mary Vasko and Margaret Fedora;both of belle Vernon;and Helen DiBasilio of Monongahela; 14 grandchildren and three great-grandchildren.  Friends will be received Wednesday from 7 to 9 p.m.and Thursday from 2 to 4 and 7 to 9 p.m.in the Ferguson Funeral Home;700 Broad Ave.;Belle Vernon.  Prayer service will be held Friday at 10 a.m.in the funeral home and Mass of Christian Burial will follow at 10:30 a.m.in St.Sebastian Roman Catholic Church.  Interment will follow in Belle Vernon Cemetery.  The Ferguson Funeral Home is handling arrangements.