BIRDS—-LARIDAE—LARUS OCCIDENTALIS. 845 
List of specimens, 
Catal. | Sex. Locality. | When Whence obtained. | Orig. Collected by— | Length. | Stretch | Wing. 
No. lcollected | No. of wings. 
Pi as oe ee dS ee | ee (| 
4355 3 | Washington, D. C--| Jan. 31, |S. G. Brown. -.-- 23.00 | 59.00 | 18. 00 
1855. 
4356 ©} jiess4ae dO=e=aeeea ae Sete Rao C0 same ne oe eo nee ans cana ae 22.50 | 59.00 16. 50 
69Z6mleoasa= Nelson river, H. B_) Wno-isbister 25.) 266002 5- 222 Wee Lie300 
Poets (of Coast New York--.- ee ee Ae oe n's| 20500 piseallee| 16. 50 
soca Oy ee esse Wee eee eerie BS u lene eemea ee 25-235 00%| = Seem 16.10 
LARUS OCCIDENTALIS, Audubon. , 
The Western Gull. 
Larus occidentalis, Aup. Orn. Biog. V, 1839, 320.—Aun. Birds Am. VII, 1844, 161. 
Laroides occidentalis, Brucn, Cab. Jour. 1855, 282.—Bon. Cons. Av. II, 1856, 219. 
Sp. Cu.— 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 ; 
iris 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, 23; depth at angle, 3; tarsus, 23. 
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 ZL. argenta‘us 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 
'§. F. Baird. : 
List of specimens. 
Catal.) Sex. Locality. When col- Whence obtained. Orig’! |Collected by— | Length | Stretch | Wing. Remarks. 
No. lected. No. of wings. 
eccese| OFOZON .ececveees seus cocsccccce| Oad.iG, Ns LAWrence.| 984 |. csccecccccncs [aceccccs|cvcccces| sececccclecccccsenccccnceccsccesseccese 
4493 | oO Shoalwater Buy..| Dec. 6, 1854 | Lieut. Williamson...|......| Dr. Cooper..| 23.00 | 54.00} 15.25 | Eye dark brown; feet brown- 
2 ish flesh color. 
4510 veeeeeleceees dO... .c0ee Jan. 6, 1855 |oeeeesdO vesceveces avesloccee |ve0edO ssvece . 21.50 | 52,50] 15.50 | Eye gray; feet black; bill yel- 
low. 
B45] |eveees|ecceeedOweesseees| Oct. 30, 1854 | Gov. Stevens ........ 108 |....d0......6.| 24.00} 55,00} 16.00 | Iris gray; yellow bill; feet 
flesh color. 
6455 |..00e- Bodega, Cal .....| Dec. —, 1854 | Lieut. Trowbridge....)...+.+ 23.00 |........] 15.75 
6463 |.-eee- Presidio, Cal ....| Ap?l25, 1853 |..00.+dO weveeeeeeere:|eceees sees 22.00)|cccie0es 15.26 
6464 |--eeee 0000s dO seceectene 25-00) |snccieees 17.00 
6465 |seere 2001 dO we a 25.00 |occccere 16.00 
6474 | O Joveees dO .reeveveee 23.00 |....000+| 15.00 
6459 | © | San Diego, Cal... 22.50) |eecccece 14.50 
G454 [oveeee [reece eA cesecceoes seat ceeeeeeees 00000 sO srevceeees eces|ecceee| A. Cassidy... | 24.00 |....0...| 16.00 |... 
