Download Free Fifty Fifth Annual Report Of The Ohio Agricultural Experiment Station For The Year Ended June 30 1936 Book in PDF and EPUB Free Download. You can read online Fifty Fifth Annual Report Of The Ohio Agricultural Experiment Station For The Year Ended June 30 1936 and write the review.

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.