AGRICULTURAL ZOOLOGY BY DR. J. RITZEMA BOS, LECTURER IN THE ROYAL AGRICULTURAL COLLEGE, WAGENINGEN, HOLLAND. WITH AN INTRODUCTION BY ELEANOR A. ORMEROD, F.R.MET.S., F.R.M.S., ETC., FORMERLY HON. CONSULTING ENTOMOLOGIST TO THE ROYAL AGRICULTURAL SOCIETY OF ENGLAND. TRANSLATED BY J. R. AINSWORTH DAVIS, B.A. (TRIN. COLL. CAMB.), F.C.P., PROFESSOR IN THE UNIVERSITY OF WALES, AND PROFESSOR OF BIOLOGY AND GEOLOGY IN THE SCIENTIFIC AND AGRICULTURAL DEPARTMENTS OF THE UNIVERSITY COLLEGE OF WALES. WITH 149 ILLUSTRATIONS. LONDON: CHAPMAN & HALL, LD. 1894 AUTHOR’S PREFACE. The present volume of the Thaer Library was undertaken with the intention of providing agricultural colleges with a condensed review of the entire animal kingdom, but treating in greater detail the animals harmful or helpful to agriculture. I have, however, omitted all reference to the domesticated farm animals, as in all such institutions these are treated of, not by the zoologist, but by the lecturer on stock-breeding. Although the book is not allowed to exceed a certain size, I have taken great pains to make it intelligible, and venture to hope that it may be found suitable for the _private use of the practical farmer_. To the farmer who wishes more exhaustive information, and desires a reference book on the animal foes of agriculture, stock-breeding, horticulture, fruit-tree culture, and forestry, I venture to point out my larger work, _Animal Foes and Friends_,[1] brought out last year by the publisher of this book. Footnote 1: Tierische Schädlinge und Nützlinge für Ackerbau, Viehzucht, Wald- und Gartenbau. Lebensformen, Vorkommen, Einfluss und die Massregeln zu Vertilgung und Schutz. Praktisches Handbuch v. _Dr. J. Ritzema Bos_, Docent an der landwirtschaftl. Lehranstalt in Wageningen. Mit 477 eingedruckten Abbildungen. Preis 18 m., geb. 20 m. Verlag von Paul Parey, 10 Hedemannstrasse, Berlin, S.W. It is hoped that the present volume may be found serviceable, both in the teaching of agricultural institutions, and to the practical farmer. DR. J. RITZEMA BOS. WAGENINGEN, _February, 1892_. TRANSLATOR’S PREFACE.