Download or read book A Review of the Parasitic Wasps of the Ichneumonid Genus Exenterus Hartig written by Robert Asa Cushman and published by . This book was released on 1940 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: This review of parasitic wasps is motivated by the discovery within the past several years that three European species of pine-feeding sawflies have become established in North America, which prompted interest in the parasites of the sawflies in this group.