The Palearctic is one of the eight ecozones of the earth. It includes terrrestrial Europe, Asia north of (and including) the Himalaya, northern Africa and northern and central Arabian Peninsula (Wikipedia, 2008).
Western Palearctic
Europe, northern and central Arabian Peninsula, and northern Africa (Robertson, 2000).
References
Robertson D. 2000. Palearctic. Downloaded 15 May 2008.
Wikipedia. 2008. Palearctic ecozone. Downloaded 15 May 2008.