Mary A.Koslasky of 223 Mary St.;Belle Vernon;died Tuesday;May 15;1990;at midnight in Jefferson Hills Nursing Home. She was 92. Mrs.Koslasky was born March 7;1898;in Poland;a daughter of the late John and Mary Varsel. For more then 65 years she had lived in Belle Vernon;where she was a member of St.Sebastian Roman Catholic Church. In addition to her parents she was preceded in death by her husband;Enoch Koslasky;Sept.28;1960;two sons;Stanley E.Koslasky;Aug.8;1959;and Raymond Koslasky;Jan.14;1983;one granddaughter;Judith;a sister;Josephine Ftyklo;and two great-grandsons. Survivors include two sons;Enoch F.Koslasky and Albert M.Koslasky;both of Belle Vernon;one daughter;Mrs.James (Julia) Paholski of Belle Vernon;one brother;Stanley Varsel of Belle Vernon;four grandchildren;three great-grandchildren;and one great-great-granddaughter. Friends will be received Wednesday from 2 to 4 and 7 to 9 p.m.in the Ferguson Funeral Home;700 Broad Ave.;Belle Vernon;where a prayer service will be held Thursday at 9:30 a.m.;followed by a Mass of Christian Burial at 10 a.m.in St.Sebastian R.C.Church;Belle Vernon. Burial will be in Belle Vernon Cemetery. The Ferguson Funeral Home is in charge of arrangements.