PREFACE 
IX 
Mr. F. R. D. Onslow and Mr. R. Shelford have spent much 
labour on my proofs, and I am deeply indebted to them; Mr. Shel- 
ford’s acquaintance with the East and extensive knowledge of 
Oriental insects of all orders has been of especial value. He had 
previously named many of my Orthoptera. 
At Professor Poulton’s suggestion I have printed in an Appendix 
translations by Mr. Ernest A. Elliott, F.Z.S., F.E.S., of a series of 
papers by Dr. Fritz Muller, dealing with the Scent-organs of Lepi- 
doptera. These valuable papers, written in German or Portuguese, 
were difficult of access, and hence too little known. I am greatly 
indebted to Mr. Elliott and Professor Poulton for their laborious 
assistance in this matter. The original illustrations have been 
reproduced. 
I have reserved to the last those to whom I am most deeply 
indebted. Dr. Dixey, F.R.S., has for many years been one of my 
most intimate friends, and he alone knows how much, and in how 
many ways I am his debtor. The Hope Professor of Zoology at 
Oxford, Dr. E. B. Poulton, F.R.S., has for the past seven years 
placed the resources of the department under his charge—and his 
able staff of assistants—at my disposal, and ever welcomes me on 
my frequent visits to Oxford, helping me in all sorts of ways. 
G. B. LONGSTAFF. 
Mortehoe, 1911. 
