Fully reviews the genera Argestina, Callerebia, Loxerebia and Hemadara, with the introduction of a number of new taxonomic combinations, subspecies and synonyms. The new genus Grumia has also been covered alongside the genus Paralasa. For every Family, Subfamily, Tribe and Genus, diagnostic features and the checklist of the lower category taxa that are found in the Paleararctic region are given in taxonomic order. A stunning collection of colour photographs are also included throughout the volume to portray each species.