BIRDS LARIDAE — LARUS OCCIDENTALS. 845 
List of specimens. 
Catal. 
No. 
4355 
4356 
6926 
Sex, 
Locality. 
When 
collected 
Whence obtained. 
Orig. 
No. 
Collected by — 
Length. 
Stretch 
of wings. 
Wing. 
<J 
9 
Washington, D. C_. 
do 
Jan. 31, 
1855. 
Market 
...do 
S. G. Brown 
do 
23. 00 
22. 50 
26. 00 
26. 00 
23. 00 
59. 00 
59. 00 
18. 00 
16.50 
17. 00 
16. 50 
16. 10 
Nelson river, H. R. 
Coast New iTork 
do 
Dr Gunn 
Jno. Isbister 
<J 
9 
Cab. J. N. Lawrence . 
...do 
982 
983 

LARUS OCCIDENTALS, Audubon. 
The Western Gull. 
Larus occidental^, Aud. Orn. Biog. V, 1839, 320— Aud. Birds Am. VIT, 1844, 161. 
Laroides occidentalis, Bruch, Cab. Jour. 1855, 282.— Bon. Cons. Av. II, 1856, 219. 
Sp. Ch. — Adult. The head, ne^k, rump, tail, and under plumage, pure white ; the back and wings grayisli blue, many shades 
darker than in L. orgentatus; the tirst six primaries are black towards their ends, extending on the first for about half its 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 a bright orange red spot on the angle of the lower mandible ; legs and feet flesh color. 
Young mottled witli 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| ; deuth at angle, I; tarsus, 2a. 
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. argentatus 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. 
Catal. 
No. 
Sex. 
Locality. 
When col- 
lected. 
Whence obtained. 
Orig'l 
No. 
Collected by— 
Length 
Stretch 
Wing. 
Remarks. 
Cab. G N. Lawrence. 
984 
4493 
4510 
Shoalwater Bay.. 
do 
Dec. 6, 1854 
Jan. 6, 1855 
Dr. Cooper . . 
....do 
23. UO 
54.00 
15.25 
Eye dark brown ; feet brown- 
ish flesh color. 
Eye gray; feet black; bill yel- 
O 
21.50 
52.50 
J5.50 
6451 
6455 
6463 
6464 
6465 
do 
Oct. 30, 1854 
Dec.—, 1854 
Ap'l 25, 1853 
108 
....do 
24.00 
55.00 
16.00 
Iris gray; yellow bill; feet 
flesh color. 
Lieut. Trowbridge.. . . 
do 
T. A. Szabo . 
23.00 
15.75 
Presidio, Cal .... 
22.00 
15.26 
25.00 
17.00 
25.00 
16.00 
6474 
6459 
6451 
o 
May 4, 1853 
23.00 
15.00 
o 
22.50 
14 50 
A. Cassidy... 
24.00 
16.00 
