Combine sugar, flour, cinnamon and nutmeg. Divide mixture in four parts.
Arrange one third of apple slices over bottom of pastry-lined 9" pie pan. Sprinkle with one fourth of sugar-spice mixture. Cover with half of the cherries; sprinkle on second fourth of sugar-spice mixture. Repeat, using all of sugar-spice mixture, apples and cherries. Dot with butter. Adjust top crust; flute edges and cut vents.
Bake in hot oven (400°F.)50 minutes, or until pastry is browned and filling is bubbly in vents.