PREFACE TO THE SECOND EDITION. 



SiKOB this volume was published in 1899 considerable advance 

 has been made in the subject of Economic Zoology. Conse- 

 quently many alterations have had to be made in this second 

 edition, and a considerable amount of new matter has had to 

 be incorporated. 



The general scope of the work for teaching purposes has not 

 been altered, as it seems to have met with general approval 

 both at home and in the Colonies. 



FRED. V. THEOBALD. 



Wye Court, Wye, 



