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A Review of the Parasitic Wasps of the Ichneumonid Genus Exenterus Hartig

Robert Asa Cushman

出版	U.S. Department of Agriculture, 1940
URL	http://books.google.com.hk/books?id=l1kgtNq4ieoC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

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.