Carefully place bottom crust in a standard-sized pie plate. Spread a mixture of 1/4 c. sugar and 2 Tbsp. flour over the bottom crust. Toss the blueberries with the remaining sugar and flour to evenly coat. Dot with butter and sprinkle the lime juice over the berries. Cover with the top crust, and use a fork to poke several holes. Turn edges under the bottom crust and crimp to seal. Sprinkle with a little sugar. Bake at 450 degrees for 20 minutes, then turn the oven down to 350 and bake for an additional 30 minutes. To prevent over-browning of the edges, cover them with foil when you turn the oven down.