Xii INTRODUCTION. 



and uniecoided. It is, therefore, impossible to exclude any bird 

 from a full place on the list so long as it has been once satisfactorily 

 recorded as having occurred in this country in a vnld state. 



The British Distribution includes the information published 

 in the February issue of " British Birds " (i.e. down to page 260 

 of Vol. v.), while the Distribution Abroad has been brought down 

 to the end of the year 1911. 



The various sections of the work have been apportioned amongst 

 us as follows : — 



Nomenclature : Hartert. 



British Distribution : Witherby, assisted by Ticehurst and 

 Jourdain. 



Distribution Abroad : Hartert, assisted by Jourdain. 



^ligrations : Ticehurst. 



But each of us has revised the other's work, and we hope that 

 our Hand-List will make a step towards uniformity in nomenclature 

 and a more exact knowledge of the distribution of our birds. We 

 need hardly add that any information as to errors of omission or 

 commission ^\ill be sincerely appreciated by 



THE AUTHORS. 



326, High Holborn, 

 April, 1912. 



