As he smoked, his legs stretched out in front of him, he noticed a grasshopper walk along the ground and up onto his woolen sock. The grasshopper was black. As he had walked along the road, climbing, he had started many grasshoppers from the dust. They were all black. They were not the big grasshoppers with yellow and black or red and black wings whirring out from their black wing sheathing as they fly up. These were just ordinary hoppers, but all a sooty black in color. Nick had wondered about them as he walked, without really thinking about them. Now, as he watched the black hopper that was nibbling at the wool of his sock with its fourway lip, he realized that they had all turned black from living in the burned-over land. He realized that the fire must have come the year before, but the grasshoppers were all black now. He wondered how long they would stay that way.
Hemingway, Ernest. “Brave Two-Hearted River Part I” In Our Time.