BIRDS — LARJDAE — LARUS 0CCIDENTALI8. 



845 



List of specimens. 



Locality. 



When 

 lollected 



Wiishingtou, D. C. Jan. 31, 

 I 1855. 



.do. 



.do. 



Nelson river, H. II. 



Coast New York i 



do ' 



Whence obtained. 



Orig. j Collected by — 

 No. 



Miuket S. Ci. Brown. 



.do- 



983 



do do 



Dr. Gunn ! Jno. Isbister 



Cub. J. N. Lawrence . 982 



Wing. 



18.00 



k;. CO 



17.00 

 16.50 

 16.10 



LAEUS OCCIDENTALIS, Audubon. 



TUo AVcgtcm Gull. 



Larus occidenlalis, Aun. Om. Biog. V, 1839, 320.— Alb. Birds Am. VII, 1844, ICl. 

 Laro'uUi occidenlalis, Bruch, Cab. Jour. 1855, 282.— Bon. Cons. Av. II, 185C, 219. 



Sp. Cu. — Mult. The head, neck, rump, tail, and under plumage, pure while ; the b,ick and wings grayish blue, many shades 

 darker than in 7.. argentalus; the first si.x primaries are black towards tlieir ends, e.\tending on the first fi>r about lialfits length, 

 and lessening on the others, until on the sixth it is reduced to a narrow sub-terminal bar ; the tips of all are white, on the first 

 the white is an inch and a half in extent, and crossed near the end with black ; secondaries and tertiaries with broad white tips; 

 'ris gray ; bill deep yellow, with u bright orange red spot on the angle of the lower mandible ; legs and feet flesh color. 



Young mottled with lead colored brown, grayish white, and brownish ash, lighter on the lower parts; primaries blackish 

 brown; bill brownish black, dull yellow at base; legs and feet brownish flesh color. 



Length, 25 inches; wing, 17; tail, 7 ; bill, 2| ; depth at angle, J; tarsus, 2J. 



Hab. — Northwest coast of North America. 



There are numerous specimens of all ages of this well marked species in the collection ; it is 

 easily distinguished from L. argentakis by its darker colored mantle. A striking characteristic 

 in the young of this species is its very stout bill, which, though much shorter than in the adult, 

 has comparatively great depth at the angle. 



Mr. Audubon's original specimens of this species are now in the private cabinet of Professor 

 S. F. Baird. 



List of specimens. 



Caial. Sci. 

 No. I 



4493 O 

 4510 



6451 



6455 

 64fi3 

 6464 

 6465 

 6474 

 6459 

 6454 



Locality. 



When col. 

 tected. 



Oregon 



Shoalwater B:iv. 



.do. 

 .do. 



Whence obtained. 'Orig'l 

 No. 





Dec. 6, 1854 

 Jan. 6,1855 

 Ocu 30, 1854 



Dec — , 1854 

 Ap'l 35, 1853 



Bodega, Cal . . 

 Presidio, Cal . 



.... do 



do i 



do I May 4, 1653 



San Diego, Cal... 



do 



Cab. G. N. Lawrence. 984 

 Lieut. Williamson 



do 



Gov. Stevens . 



Lieut. Trowbridge., 



do 



, do 



do..,, 



do 



, do 



do 



Collected by- 



Dr. Cooper . 



,...do 



....do 



T. A. Szabo . 

 ....do 



A. Cassidy., 



Length 



21.50 



24.00 



23.00 

 22.00 

 25.00 

 25.00 

 23.00 

 22.50 

 24.00 



Stretch 



ofwings. 



54.00 

 52.50 



55.00 



Wing. 



Remarks. 



15.25 



15.50 



16.00 



15.75 

 15.26 

 17.00 

 16.00 

 15.00 

 14 50 

 16.00 



Eye dark brown ; feet bro\vn- 



ish flesh color. 

 Eye gray; feet black; bill yel- 



low. 

 Iris gray; yellow bill; feet 



flesh color. 



