The Angel Moth has a wingspan of 1.50 to 1.75 inches. The forewing is pale gray with brown lines and shading. There are 2 translucent spots at the midpoint of the subterminal line. The hindwing is pale brown with darker brown shading. Both the forewing and hindwing are scalloped. The thorax has a sharp, brown dorsal ridge. The caterpillar is flattened and gray with long “hair” especially at the head and the back of the abdomen. The second thoracic segment has a reddish-brown “ruff,” which is concealed when at rest. When alarmed it raises its red “ruff.” It grows to about 2 inches.