258 LiRIDjE. 



head ; mantle somewhat mottled, quills sooty brown, tail-coverts 

 barred with umber on a white ground ; rectrices dark brown with 



ry narrow white tips, but otherwise uniform, without any 

 mottling or marbling : under surface greyish brown to brownish 

 grey ; under wing-coverts dark brown : bill blackish, flesh-coloured 

 at the base ; tarsi and toes flesh-colour (drying pale browu). 



Immature. Head and neck mottled with pale brown, the under- 

 parts nearly dull white ; the middle of the mantle and the scapulars 

 nearly pure slate-colour, but the wings still mottled with brown ; 

 the taU- coverts nearly white, but the rectrices uniform brown : 

 bill yellow, with a black band across the angle. 



At a later stage there is an increase of slate on the mantle ; the 

 tail-feathers are chiefly white, with spots or a broken bar of black, 

 subterminally ; head and underparts white. 



Nestling. Bufiish grey, the head boldly spotted with black, and 

 the back rather thickly streaked with blackish. 



Hah. Pacific coast of North America, from Washington Terri- 

 tory to the southern portion of Lower California. 



& juv. Pacific Beach, Cala., April H. Saunders Coll. 

 and Aug. (Heijlurn). 

 Farallones, San Francisco H. Saunders Coll. 



Bay, June 23 {Hepburn). 

 San Francisco Bay {F. Gru- H. Saunders Coll. 



ber). 

 San Francisco Bay (Culis). H. Saunders CoU. 

 Santa Cruz Island, Cala., Salvin-Godman Coll. 



June {H. W. Henshmc). 

 Santa Cruz Island, Cala., II. Saunders Coll. 

 June {H. TV. H). 

 i. Ad. sk. GiT Sta. Cruz Island, 3.3° N., H. Saunders Coll. 



119° W., March {Admiral 

 A. H. Markliam). 

 k. Vix ad. sk. San Miguel Island, Cala., Salvin-Godman CoU. 



Aug. {H. W. Henshmv). 

 I, in. (S ad. sk. Ventura, Cala., Nov. {H. Salvin-Godman Coll. 



TV. H). 

 n. 5 ad. sk. Magdalena Bay, Lower Cala., II. Saimders Coll. 



Nov. {G. Mathnu, R.N.). 

 o, p. 5 ad. & juv. San Diego, Dec. {H. TV. Salvin-Godman Coll. 

 sk. He)ishaiv). 



31. Larus schistisagus. 



Larus argentatus (part.), Middend. Seise Sib., Zool. p. 243 (1851 : 

 Okhotsk Sea) ; Kittl. Denkw. Reis. ii. p. 255 (1858). 



Larus cachinnans {nee Pall.), Kittl. Denkio. Reis. i. p. 336 (1858) ; 

 Stejneg. Naturen, 1884, p. 6. 



Larus fuscescens, Meioes, (Efv. Ak. Fork. 1871, p. 787. 



Larus marinus (nee Linn.), Swinh. Ibis, 1874, p. 165 (Hakodadi, 

 Japan); Saunders, P. Z. S. 1878, p. 180 (part.: same loc); 

 Seebohm, Ibis, 1879, p. 24; Bean, Pr. U.S. Nat. Mus. 1882, 

 p. 168 ; Ridgtv. Bull. Ntdt. Orn. Club, 1882, p. 60 (both sides 

 Bering Str.) ; Blakist. 8c Pryer, Tr. As. Soc. Jap. x. pt. i. p. 104 



