The Large Housefly (Coenosia sexmaculata) is an insect in the Muscidae family of true flies.

The Large Housefly has a head, thorax (chest), and abdomen (stomach). It is black with four dark, longitudinal lines from its head to its tail. Its body and legs are slightly hairy. It has large, red, compound eyes. Near the compound eyes are three small simple eyes, called ocelli, and a pair of short antennae. It has six legs and one pair of membraneous (transparent) wings. Its mouthpart has a proboscis to suck liquid.