PEEFACE TO SECOND EDEFrON. 



As author of a work on a subject which does not appeal to 

 a very wide circle of readers, I realise that it is a very high 

 compliment that a second edition has been called for in a 

 comparatively short time. Hence there is no need for drastic 

 changes. I have, however, tried to benefit by the kindly 

 advice given by entomological friends and others interested 

 in the subject ; therefore the chapters have been re-arranged 

 more in accordance with the sequence of entomological classi- 

 fication. I have tried also, as far as I possibly can, to correct 

 the recognition of photos and drawings of several friends. In 

 this respect the first edition showed a slight error in acknow- 

 ledging special photos as emanating from a friend rather than 

 the firm of which he was a partner, and to whom I am very 

 grateful for assistance. 



I am specially indebted to Professor Carpenter, of the Koyal 

 College of Science, Dublin, for correcting several points in the 

 Introductory chapter. 



I have every reason to be gratified by the many kind letters 

 received from all parts, — from the landowner seeking further 

 advice with regard to some special insect pest ; and from the 

 young forester or nature-student trying to begin making a 



