284 



quill bears a narrow, but complete, subterminal bar. Bill olive- 

 green basally, yellow at the tip ; orbital ring vermilion ; tarsi and 

 toes olive-colour, the webs yellowish. Total length about 17 inches, 

 culmen 1"75, wing 13o to 14, tail 6, tarsus 1-9.5, middle toe with 

 claw 1-75. 



The female is probably somewhat smaller, but the Museum series 

 is not sufficient for a positive statement. 



Yoimc/. As in the last species, except that the brown has a 

 greyer tint and the spangled markings are less defined. 



Immature. Allowing for a larger proportion of grey colour in the 

 primaries, this phase is similar to that in L. camis. 



Nestling in half-down. Greyish brown, the new feathers on the 

 mantle tipped with buiF ; the black spot at the base of the biU very 

 strongly marked. 



Hah. Western portion of Arctic and sub-Arctic America ; in winter 

 down the Pacific coast to California. Kuril Islands (once). 



Capt. Kellett & Lt. 



Wood, E.N. [P.]. 



Salvin-Godman Coll. 



a, b. Juv. sk. 



c. Juv. ptil. ; d-k. 

 cJ juv.,5imm., 

 et c? 2 ad. sk. 



I. Juv. sk. 



m. S fid. sk. 



n. Ad. sk. 

 0. Juv. sk. 



p. Vix ad. sk. 

 q. (S juv. sk. 

 /•. (S juv. sk. 



s. 2 ad. sk. 



t. (S ad. sk. 



It, v. 6 2 juv. sk. 



iu. Ad. sk. 



Buckland Kiver, N.W. 



America. 

 St. Michael's, Alaska, June- 



Aug. (E. W. Nelson). 



St. Michael's, Alaska, Aug. 



E. W. N). 

 Lake Nushagak, Alaska (Z. C. 



McKay). ' 

 Kadiak, Alaska ( W. J. Fisher). 

 Esquimalt, Vancouver I., Dec. 



{Hepburn). 

 Caiiforniau coast. 

 California {H. W. Henshaio). 

 Humboldt Bay, Cal., Dec. 



(C. H. Toumsend). 

 San Mateo, Cal., Jan. {Hep- 

 burn) . 

 Ventura, Cal., Nov. {H. W. 



Henshaiv). 

 Sau Diego, Cal., Dec. {H. W. 



H.). 

 Kurd Islands?, Feb. {H. J. 



Snow) . 



H. Saunders Coll. 



H. Saunders Coll. 



H. Saunders Coll. 

 H. Saunders Coll. 



H. Saunders Coll. 

 Salvin-Godman Coll. 

 Salvin-Godman Coll. 



H. Saunders Coll. 



Salvin-Godman Coll. 



Salvin-Godman Coll. 



Seebuhm Coll. 



40. Larus glaucescens. 



[?] Larus glaucopterus, Kittlitz in Lutke's Voy. ' Seniavine,^ French 



transl. iii. p. L'72 & p. 280 (1836 : Ounalacbka) * ; id. Henkw. i. 



p. 259 & p. 335 (1858). 

 Larus glaucescens, Naum. Vog. Deutschl. x. p. 3ol (1840 : type in 



Berlin Mus.) ; Baird, Cass., ^ Lawr. B. N. Amer. p. 842 (1858) ; 



Kittl. Henkw. i. p. 259, p. 285, p. 335 (1858) ; Coues, Pr. Philad. 



Acad. 1862, p. 295 ; Elliot, Neiu ^- Unfg. B. N. Amer. i. Introd. 



The brief description (p. 280) would equally apply to L. nelsoni. 



