Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Moth, The Pale Stigma (Mesogona acetosellae) is a moth of the Noctuidae family. It is found in central and southern Europe, Turkey, the Caucasus, Armenia, Kazakhstan and from western Siberia to the Altai. The wingspan is 40-44 mm. Adults are on wing from August to September depending on the location. There is one generation per year.The larvae feed on Prunus spinosa, Quercus, Crataegus and Populus species.