(VI) 



6. Since this book is entirely popular and the informa- 

 tion has appeared previously in the publications already 

 mentioned, 1 have made no attempt to quote references to 

 authorities. 



7. Planters and others who use this book are almost 

 certain to find many points where the information given 

 fails to apply exactly to the local conditions. If these 

 differences could be reported and recorded, the added 

 information thereby acquired would be extremely useful in 

 preparing a revision, if that should become desirable. 



8. The blocks from which the illustrations are produced 

 are all in the possession of this Department, having been 

 acquired during the past twelve years from several sources, 

 which are indicated on another page, where acknowledg- 

 ments are made. The source from which the blocks have 

 been obtained is stated alsD in connexion with the legend 

 which is given with each figure. 



9. The Rev. N.B. Watson, F.E.S., has been kind enough 

 to read the proof critically ; for this I desire to express 

 my thanks. 



I have the honour to be, 



Sir, 

 Your most obedient servant, 



(Sgd.) 



H. A. BALLOU, 



Entomologist. 



