BIRDS—LARIDAE—LARDS OCCIDENTALIS. 
845 
List of specimens. 
Catal. 
No. 
Sex. 
Locality. 
When 
collected. 
Whence obtained. 
Orig. 
No. 
Collected hy— 
Length. 
Stretch 
of wings. 
Wing. 
4355 
$ 
Washington, D. C.. 
Jan. 31, 
Market___ 
S. G. Brown_ 
23. 00 
59. 00 
18. 00 
1855. 
4356 
9 
22. 50 
59. 00 
16. 50 
6926 
Nelson river, H. B. 
Dr. Gunn....... -_ 
.Jno. Isbister_ 
26. 00 
17. 00 
Coast New York_ 
Cab. J. N. Lawrence - 
982 
26. 00 
16. 50 
O 
__do_ 
_do___ 
983 
23. 00 
16. 10 
LARUS OCCIDENTALIS, Audubon. 
Tlie Western Gull. 
Larws occidentalis, Aud. Orn. Biog. V, 1839, 320.— Aud. Birds Am. VII, 1844, 161. 
Laroides occidentalis, Bruch, Cab. Jour. 1855, 282.— Bon. Cons. Av. II, 1856, 219. 
Sp. Ch. — Adult. The head, neck, rump, tail, and under plumage, pure white ; the back and wings grayish blue, many shades 
darker than in L. argentatus; the first 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; 
his gray ; bill deep yellow, with a 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, ; tarsus, 2-J. 
Hub. —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 hy its darker colored mantle. A striking characteristic 
in the young of this species is its very stout hill, 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 
of wings. 
Wing. 
Remarks. 
Cab. G. N. Lawrence. 
984 
4493 
Shoalwater Bay.. 
Dec. 6, 1854 
Dr. Cooper .. 
23.00 
54.00 
15.25 
Eye dark brown; feet brown¬ 
ish flesh color. 
4510 
Jan. 6,1855 
21.50 
52.50 
15.50 
Eye gray; feet black; bill yel¬ 
low. 
6451 
Oct. 30,1854 
108 
....do. 
24.00 
55.00 
16.00 
Iris gray; yellow bill; feet 
flesh color. 
6455 
6463 
6464 
6465 
6474 
6459 
6454 
Dec.—, 1854 
Ap’l 25, 1853 
Lieut. Trowbridge.... 
23.00 
15.75 
Presidio, Cal .... 
22.00 
15.26 
25.00 
17.00 
25.00 
16.00 
o 
May 4, 1853 
23.00 
15.00 
O 
22.50 
14.50 
A. Cassidy... 
24.00 
16.00 
