The Bronzy Macrochilo has a wingspan of about 1 inch. The forewing is bronze brown with a paler subapical dash. Some individuals are paler with brown streaks along the veins. A black bar goes through the orbicular and reniform spots. The hind wings are pale gray and plain. The larva grows to less than an inch long. It is reddish brown with a white sub-dorsal stripe that extends the length of the body. There are pale orange dorsal bands at the segments. The head is pale brown with faint markings.