Mesoleius opticus
Description
Biology
A parasitoid.
The recorded hosts are Acronicta alni, Bupalus piniarius, Cimbex connata, Nematus capreae, Nematus melanaspis, Nematus pavidus, Nematus pavidus [Salix fragilis], Nematus salicis, Nematus virescens and Panolis flammea.
Distribution
Known from the Palaearctic realm with records from Austria, Belgium, Czechoslovakia, Finland, France, Georgia, Germany, Latvia, Netherlands, Poland, Russia-Chita Oblast, Russia-Krasnoyarsk Kray, Sweden, Ukraine and the United Kingdom.
