 Two beaches are closed until further notice. Family and friends said their final goodbyes Friday to a mother and her young child in Larchmont. Molly Murphy Donovan of Mamaroneck and her six-year-old son Michael Volpe were killed last Thursday when they were struck by a school bus. Mother and son were walking to school when the bus hit them on Mamaroneck Avenue. Police say they were in the crosswalk, had a walk signal when they were struck.