LARUS 



1143. BLACK-TAILED GULL. 

 LARUS CRASSIROSTRIS. 



Larus craszirostris, Vieill. Nouv. Diet. xxi. p. 508 (1818) ; David ami 

 Oust Ois. Chine, p. 519 ; Seebohm, B. Jap. Emp. p. 293 ; Tacz. 

 F. O. Sib. O. p. 1037 ; Saunders, Cat B. Br. Mus. xxv. p. 227 ; 

 L. melanurus, Temm. PI. Col. livr. 77, pi. 459 (1828) ; id. and 

 Schlegel, Faun. Jap. Aves, p. 132, Tab. 88. 



Umineko, Jap. 



<J ad. (Japan). Head, neck, under parts and upper tail-coverts white ; 

 -mantle slate-grey ; tail white, the base pale grey, all except the outermost 

 feather on each side crossed by a broad subterminal black band ; the five 

 outer primaries blackish with white tips, increasing in size inwards ; 

 scapulars and secondaries edged with white ; under wing-coverts white ; 

 bill greenish yellow, becoming orange at the tip, and crossed by a black 

 band ; legs and feet fleshy brownish ; iris pale straw-yellow, the edge of 

 the eyelids vermilion. Culmen 2*5, wing 15*5, tail 6'0, tarsus 2'3 inch. 

 In winter similar, but with a little greyish brown on the head and nape, a 



Hob. The Ussuri country, Eastern Siberia, the coasts of the 

 Sea of Japan, and -Japan, the Island of Saghalien, and China 

 south to about 22 N. lat. 



Is easily recognizable from L. canus (which it somewhat 

 resembles) by the broad black band on the tail ; it frequents 

 the sea coast, large rivers and lakes, and is one of the commonest 

 species in Japan and North China. I find but little on record 

 respecting its nidification, excepting that it nests on rocks, 

 -depositing from the middle of May to the early part of June 

 3 eggs, which vary in ground-colour from ochreous grey to pale 

 olivaceous, and are spotted, blotched, and scratched with blackish 

 brown or yellowish brown, in size measuring about 2'50 by 1*75. 



1144. HERRIXG-GULL. 

 LARUS ARGENTATUS. 



Larus argentatus, Ginel. Syst. Nat. i. p. 600 (1788) ; Naum. x. p. 379, 

 Taf. 266 ; Hewitson, ii. p. 499, pi. cxL; Gould, B. of E. v. 

 pi. 434 ; id. B. of Gt. Brit. v. pi. 59 ; Dresser, viii. p. 399, pi. 602, 

 fig. 1 ; Saunders, Cat. B. Br. Mus. xxv. p. 260 ; id. Manual, p. 673 ; 

 Ridgway, p. 30 ; Lilford, vi. p. 51, pi. 23 ; L. smithsonianus, Coues 

 Proc. Philad. Ac. 1862, p. 296 ; Ridgway, p. 31. 



Gotland argentt, French ; Gaivota, Alcatraz, Portug. ; Gaviota, 

 Gavinot, Span. ; Silbermowe, German ; Zilvernufuw, Dutch : 



-. 



