The adult house fly (about 6–7 mm long) is gray in general color.
Like all flies, it has two wings and a body divided into three parts: head, thorax and abdomen.
The thorax is gray with four equally broad dark longitudinal stripes on the dorsum. The abdomen has yellowish sides on the basal half; the posterior portion is brownish-black and a dark longitudinal line extends along the middle of the dorsum.
The legs are blackish-brown. The wings are nearly clear and the venation is distinctive with the fourth longitudinal vein (M1+2) bent sharply upwards near the end of the wing so as to nearly meet the vein (R4+5) in front of it (Figure 16A).
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