Lena D.Pupilli Salvino;87;of 537 Green St.;Belle Vernon;died Thursday;Feb.13;1997;in Mon Valley Hospital.  Born Oct.20;1909; in Twilight Borough;she was a daughter of the late Anthony and Mary Paperi Pupilli.  Mrs.Salvino was a lifelong resident of the Belle Vernon community;where she was a member of St.Sebastian Roman Catholic Church.  Survivors include one son;Eugene J.Salvino of Pittsburgh;one brother;Eldo D.Pupilli of Belle Vernon;and three grandsons;Jarrod;Todd and Carmen Salvino.   In addition to her parents;she was preceded in death by her husband;Jano Eugene Salvino on May 26;1993;three brothers;Eugene;Bruno and Dino Pupilli;and one sister;Gena Schuresko.  Friends will be received Friday from 2 to 4 and 7 to 9 p.m.in the Leonard J.Parzynski Funeral Home;626 Broad Ave.;Belle Vernon.  A Prayer service will be held Saturday at 9:30 a.m.;in the funeral home;followed by a Funeral Mass at 10 a.m.in St.Sebastian Roman Catholic Church;Belle Vernon;with the Rev.E.George Saletrik;parochial vicar;as celebrant.  Interment will follow in Belle Vernon Cemetery.  The Legion of Mary will recite the Rosary on Friday at 3 p.m.in the funeral home.  The Leonard J.Parzynski Funeral Home is in charge of arrangements.