Insecta , Lepidoptera , Noctuidae .
Hind wings are entirely white.
Eggs are laid under the sheath of leaves in small clusters of about ten. They hatch after 10 to 14 days. The resulting moths lay their eggs on flowers and cereal ears. Larval development lasts about 45 days. Some individuals may complete their development at the end of summer and then undertake a brief autumnal flight.