About Zanna tenebrosa (Fabricius, 1775)
Zanna tenebrosa has a thin coating of white waxy powder, and a large, orange, lantern-like head or snout. It can be distinguished from most species by the shape and colour of its head, and the colour of its hindwings. Only two other valid species share these general features: Z. flammea and Z. pauliani. Z. tenebrosa differs from Z. flammea by having a truncate (not apically convex) cephalic process, which is the name for the head projection, and differs from Z. pauliani by having a straight (not curved) cephalic process.
