vi Editor s Preface. 



have been reared from it, and the species of oak on 

 which it is recorded as having been found. 



My grateful acknowledgements are due to Dr. Adler, 

 Mr. E. A. Fitch, and Mr. A. Ehrmann for their 

 assistance in correcting the proofs, and to Professor 

 Mayr and Baron C. R. Osten-Sacken for information 

 on special points. 



C. R. S. 



West Lodge, 

 Wilton, 



Salisbury. 



