From Ohio History Central
Common House Fly
Common house flies (Musca domestica) need no identification. They are the most recognizable insects in the world. They have a grayish-black thorax, large red eyes and only one pair of transparent wings (most insects have two pairs).
House flies invade homes, and are not only a nuisance, but can transmit diseases, including typhoid, cholera, and dysentery. Because they have a sponging mouth type, they do not bite, but can leave diseases on items that they have landed or fed on.
Adult house flies will lay approximately 150 eggs on the larvae’s food source. The larvae are white and legless and are better known as maggots. Maggots feed on a diet of rotting food, including vegetable and meat matter and manure. In warm weather, it takes approximately one to two weeks for the larvae to complete the metamorphosis and become adults with a body size of 1/4 to 5/16-inch long. Adults feed on liquid with sweet or decaying matter in it. The life cycle of house flies is eight weeks.
The best way to control house flies, is by getting rid of rotting food and manure, either by throwing it in the garbage, composting, or plowing it under. It is also important to screen the doors and windows of your home and barn.