What is "empretia stimulea"

Saddleback \Sad"dle*back`\, n.

1. Anything saddle-backed; esp., a hill or ridge having a concave outline at the top.

2. (Zo["o]l.)

   1. The harp seal.

   2. The great blackbacked gull ( Larus marinus).

   3. The larva of a bombycid moth ( Empretia stimulea) which has a large, bright green, saddle-shaped patch of color on the back.