xii PREFACE. 



history of the gypsy moth in Europe ; and to Dr. F. B. 

 Stephenson, U. S. N., for the translation of Russian works. 



We are greatly indebted to Messrs. J. A. Farley and A. 

 H. Kirkland for very valuable services in connection with 

 the preparation of the report. Mr. Farley, who has made an 

 exhaustive study of the distribution of the gypsy moth, has 

 contributed the material for that portion of the paper on 

 distribution which treats of the ' ' methods and routes of 

 transportation." While certain portions of Part II. are 

 credited in the text to Mr. Kirkland, he has been of great 

 assistance to the authors in many other ways. Messrs. F. 

 H. Jones, F. A. Bates and C. W. Minott have rendered 

 much aid in the way of criticism and suggestion. Lack of 

 space forbids the mention by name of the scores and even 

 hundreds of other intelligent observers, more or less per- 

 manently connected with the work, who have furnished use- 

 ful notes. 



The main credit for the production of this volume is due 

 to the committee of the State Board of Agriculture, who 

 have for five years conducted the work with the steadfast 

 purpose of ridding the Commonwealth of the gypsy moth. 

 They have recommended that the Legislature authorize the 

 preparation and printing of the report. They have con- 

 ferred upon us the honor of preparing the volume, and our 

 thanks are due to them for endorsement of our plans and 

 for their constant and consistent support. 



THE AUTHORS. 



