6 t 



Bree (B. of Eur. i. p. 32). Mr. J. H. Gurney, for whom the drawing was made, has kindly lent 

 it to me for the present work. 



In the preparation of the above article I have examined the following specimens : — 



E Mus. II. E. Dresser, 

 a, d. Bulgaria; July 1865 (Farman). b, d, c, 2- Volga, March (Moschler). d, d juv. Volga (Moschler). 



E Mus. Norv. 



a, ad. Athens (Parzudaki). b, ad. Tarsus (Mr. Barker). c, d, d juv. Near the mouth of the Volga 

 (M. Lefevre). e, 2 juv. Volga (Verreaux). f, 2- Syria (Verreaux). g, 2. Egypt (Verreaux). It, juv. 

 Moradabad (F. Barr), i, 2. Tientsin, China (Sivinhoe). 



