The underside of the moth is white to yellow on the thorax and burgundy to black on the abdomen. When it first hatches, the wings of H. thysbe are dark red to black. As it begins to fly, scales fall off leaving a mostly clear wing with reddish-brown borders and veins.
The underside of the moth is white to yellow on the thorax and burgundy to black on the abdomen. When H. thysbe first hatches, its wings are dark red to black. As it begins flying, scales fall off, revealing a mostly clear wing with reddish-brown borders and veins.