542 



10 



correct. The bird, after the first down-clothing, gradually assumes a dark plumage, in which 

 the base of the tail is white, and the tarsi (as a rule) are also white. As the bird approaches 

 maturity the tarsi become tinged with brown or rufous buff, and the tail gets marked with 

 greyish brown on the basal portion, until, after a time, the fully adult dress is assumed. 

 The specimens figured are the adult and young birds above described. 



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



E Mus. H. E. Dresser. 



a, 3 jun. Falster, Denmark, January 1865. b, 8 jun. Laaland, Denmark, December 187] (A. Benzon). 

 c, 2 ad- Central Russia (Dr. Stader). d, 8 ad. Glinnik, Archangel, March 17th, 1873 (Piottuch). 

 e, 8 juv. Sierra Nevada, Spain, January 1871 (H. Saunders). 



E Mus. Brit. Reg. 



a, b, pull., c, juv., d, 8 ad., e, $ ad. Orkneys (Bullock), f, ad. Archangel. g,2juv. Skane, Sweden, 

 November 1872 (Meves). h,juv. Tunis, i, k, juv. Huzara, N. Punjab (Capt. Uniuiri), I, <S ad. Nepal 

 (Hodgson), m, ad., n, o,juv. N. America, p, ad. Port Simpson, N. America (B. H. Ross). 



