BIRDS OF NORTH AND MIDDLE AMERICA. 611 
Island; San Pedro Martir Island; Los Coronados Islands) northward 
to British Columbia (Similkameen Valley); migrating southward to 
Isabella and Tres Marias islands, Tepic, casually to Socorro Island, 
Revillegigedo group (specimen found dead May 3, 1897), northward 
to Vancouver Island; accidental in Colorado (Loveland, Sept. 30, 
1889). 
Larus occidentalis AupuBoN, Orn. Biog., v, 1839, 320 (Cape Disappointment, 
Washington); Synopsis, 1839, 328; Birds Am., 8vo ed., vii, 1844, 161.— 
Lawrence, in Baird, Rep. Pacific R. R. Surv., ix, 1858, 845.—Barrp, Cat. 
N. Am, Birds, 1859, no. 662.—Casstin, Orn. U.S. Expl. Exped. (Wilkes), 
1858, 247 (California)—HrEermMann, Rep. Pacific R. R. Surv., x, pt. iv., 
1859, 73 (coast California; habits)—Cooprer and Sucker, Rep. Pacific 
R. R. Surv., xii, pt. ii, 1860, 271 (Shoalwater Bay, Straits of Fuca, etc., 
Washington; Lower California; habits)—Cousrs, Proc. Ac. Nat. Sci. Phila., 
1862, 296 (monogr.); Ibis, 1866, 271 (San Pedro, California); Check List, 
2d ed., 1882, no. 774.—Scutecer, Mus. Pays-Bas, vi, no. 23 (Lari), 1863, 
15.—Exuiot, New and Unfig. N. Am. Birds, pt. 7, 1867 (vol. ii), pl. 52, upper 
fig., and text.—Ripaway, Proc. U. S. Nat. Mus., iii, 1880 (Cat. N. Am. 
Birds), 207; Nom. N. Am. Birds, 1881, no. 664.—SaunpErs, Proc. Zool. Soc. 
Lond.; 1878, 172 (monogr.); Cat. Birds Brit. Mus., xxv, 1896, 257.—Br.pine, 
Proc. U. 8. Nat. Mus., v, 1883, 545 (Cape district, Lower California).—Barrp, 
Brewer, and Ringway, Water Birds N. Am., ii, 1884, 230.—Hensnaw, 
Auk, li, 1885, 232 (California coast).—AMBRICAN ORNITHOLOGISTS’ UNION, 
Check List, 1886, and 2d ed., 1895, no. 49; 3d ed., 1910, p. 38.—Buaxg, Auk, 
iv, 1887, 329 (Santa Cruz Island, California, breeding).—Bryant (W. E.), 
Proc. Calif. Ac. Sci., 2d ser., i, 1888, 37 (Farallon Islands, breeding; habits; 
descr. nest and eggs).—Goss, Auk, v, 1888, 240 (San Pedro Martir Island, 
Lower California, breeding).—Jerrries, Auk, vi, 1889, 222, in text (Santa 
Barbara, California) —LawRENCcE (R. H.), Auk, ix, 1892, 41 (Grays Harbor, 
Washington, winter resident) —GnrinNELL (J.) Pub. 1, Pasadena Acad. Sci., 
1897, 23 (Santa Barbara Islands, breeding); Pacific Coast Avif., no. 11, 1915, 
21 (breeding on Farallons, Santa Barbara Islands, etc.).—Cooxz, Birds Col., 
1897, 50 (Loveland, Colorado, 1 spec., Sept. 30, 1889); Bull. 292, U. S. Dept. 
Agric. (Biol. Surv.), 1915, 34, figs. 15, 16 (range and migrations).—ANTHONY, 
Auk, xv, 1898, 315 (Socorro Island, 1 spec., May 3, 1897).—BrewstER, 
Bull. Mus. Comp. Zool., xli, no. 1, 1902, 20 (La Paz Bay, etc., Lower Cali- 
fornia, in winter; breeding on rocky islet near Carmen Island).—GrinNELL and 
Daggett, Auk, xx, 1903, 30 (Los Coronados Islands, Lower California, breed- 
ing).—Ray, Auk, xxi, 1904, 434, pl. 26 (Farallon Islands; habits, etc.).— 
Kermope, Provincial Mus. Victoria, 1909, 24 (coast Brit. Columbia, resident; 
Chilliwack; breeding in Similkameen Valley). , 
L{arus] occidentalis Gray, Gen. Birds, iii, 1846, 654.—Buasrvus, Journ. fiir Orn., 
1865, 379 (crit.).—Cours, Key N. Am. Birds, 2d ed., 1884, 744.—Ripeway, 
Man. N. Am. Birds, 1887, 28. 
[Larus] occidentalis SHarre, Hand-list, i, 1899, 141.—Forszs and Roginson, 
Bull. Liverp. Mus., ii, no. 2, 1899, 58. 
[Larus (Glaucus)] occidentalis Brucn, Journ. fiir Orn., 1853, 101. 
[Larus (Laroides)] occidentalis Brucn, Journ. ftir Orn., 1855, 282.—Boucarp, 
Liste Ois. récol. Guat., 1878, 18. 
[Laroides] occidentalis Bonaparte, Compt. Rend., xlii, 1856, 770; Consp. Av., 
ii, 1857, 219. 
