A TEXT-BOOK 



AGRICULTURAL ZOOLOGY 



BY 



FEED. V. THEOBALD, M.A. (Cantab.), F.E.S. 



Foreign Member of the Aaaociation of OfScial Economic Entomologists, U.S.A. ; 



Zoologist to the S. E. Agricultural College, Wye ; 



Author of 'An Account of British Files,' 'Insect Life,' "The Faraaitic 



Diseases of Poultry,' &c. 



WILLIAM BLACKWOOD AND SONS 



EDINBURGH AKD LONDON 



M D C C C X C I X 



(J 



