VIU AUTHOR S PREFACE. 



and observations. I cannot refrain from acknowledging, 

 in addition, my indebtedness to Mr. Guy A. K. Marshall, 

 whose most careful revision has led to the detection of 

 various errors and omissions which would otherwise have 

 passed unnoticed, and whose constant helpfulness and careful 

 attention to the final stages of the work have contributed 

 considerably to the appearance and completeness of the 

 volume. 



In conclusion it may perhaps be pointed out that in this 

 and every other branch of Entomology the field open to 

 work(Ts in any and every part of the Indian region is still 

 enormous. An effort has been made to include in this 

 volume all that is at present known upon the subject of the 

 Indian insects with which it deals (it is hoped with approxi- 

 mate success), and something will have been accomplished if 

 it serves only to convey some idea how slender is the sum 

 total of that knowledge and how greatly the value of future 

 volumes of this series may be increased by the co-operation 

 of those who, by residence in India, are iu a position to 

 supply the raw materials. 



