vi Preface. 



Most of the species described in the present work were collected 

 by myself, chiefly in the neighbourhood of Punduloya at an altitude 

 varying between three thousand and four thousand feet. Some 

 particularly interesting species were discovered and sent to me by 

 that most industrious entomologist, Mr. John Pole, from Ham- 

 bantota, Tangalle, and Chilaw. Mr. W. D. Holland, of Balangoda, 

 has also very kindly sent me specimens from that district. 



To Professor G. B. Howes, of the Royal College of Science, 

 South Kensington, I must tender my sincere thanks for the 

 kindest encouragement and advice in the difficult matter of ar- 

 ranging for the publication of a work of this nature ; and to Mr. 

 F. Justen, of Messrs. Dulau & Co., for his very kind personal 

 interest and care in the actual work of publication. 



The lithographic plates, reproduced from my own drawings, 

 have been most carefully printed in colours by P. W. M. Trap, 

 of Leiden. 



The chapter dealing with the economic side of the question has 

 been compiled from various sources, and is intended to give a 

 resume of all the known methods of dealing with this group of 

 insect pests. I have particularly made free use of the numerous 

 valuable bulletins and reports issued by the United States De- 

 partment of Agriculture, the Entomological Division of which — 

 formerly under the guidance of the late Dr. C. V. Riley, whose 

 early death is greatly to be deplored, and now worthily carried on 

 by Dr. L. O. Howard — is far ahead of that of any other country 

 in the attention paid to the cure and prevention of insect pests. 

 This chapter will be issued as an appendix, and will appear with 

 Part n. of the work. 



E. ERNEST GREEN. 

 London, 



Septefnber 30, 1896. 



