Adults are large and butterfly-like. The ground color varies greatly; some specimens are brown or tan, others are bright reddish-brown. All have a small eyespot in the center of the forewing, and a very large eyespot in the middle of the hindwing. Males have smaller bodies than females, and their antennae are larger than those of females.
Larvae are bright translucent green, with convex (ballooned-out) segments. There are yellowish-red tubercles on the thoracic and abdominal segments, with those in the dorsal (top) area having a metallic luster. The head is brown.