INTEODUCTION. ix 



kindness in allowing me the free use of their unrivalled series before 

 its removal to South Kensington. 



Other kind friends and correspondents who have assisted me by 

 information and loan of specimens during the preparation of the 

 present volume are Hans, Graf v. Berlepsch, of Muenden ; Dr. A. 

 Dubois, of Brussels ; Dr. G. Hartlaub, of Bremen ; Mr. G. N. 

 Lawrence, of New York ; MM. Milue-Edwards and Oustalet, of 

 Paris; Herr A. v. Pelzeln, of Vienna; Mr. Ridgway, of Washing- 

 ton ; and Mr. Allen, of New York. I'o these I must add the name 

 of Ladislas Taczanowski, of Warsaw, whose recent death has been 

 an occasion of grief to all Ornithologists. 



P. L. SCLATER. 



3 HanoTer Square, London, W. 

 March 1st, 1890. 



