BIRDS OF NORTH AND MIDDLE AMERICA. 655 
Pacific coast of North America, from Guerrero, Mexico, to Van- 
couver Island, British Columbia; breeding on islands in Gulf of 
California (Isla Raza; Ildefonso Island) and Marietas Islands off 
Jalisco; also said to breed at Magdalena Bay, Lower California, Tres 
Marias Islands, Tepic, and Mazatlan, Sinaloa, but these records doubt- 
ful;? occurring but not breeding along coast of California, Oregon, 
Washington, and Vancouver Island (Fort Rupert, Oct.; Esquimault; 
William Head) and southward along coast of Lower California, 
Sonora, Sinaloa (Mazatlin, breeding?), Tepic (Isabella Island; Tres 
Marias Islands, breeding ?), Jalisco (Las Marietas Islands, breeding), 
Colima and Guerrero (Acapulco Bay, April). 
Larus heermannt Cassin, Proc. Acad. Nat. Sci. Phila., vi, 1852, 187 (San Diego, 
California); Illustr. Birds Calif., Tex., etc., 1856, 28, pl. 5—HEERMANN, 
Rep. Pacific R. R. Surv., x, 1859, pt. vi, p. 74.—Sanvin, Ibis, 1865, 190 
(Chiapam, Guatemala); 1866, 198 (Chiapam, Guatemala).—SciaTEr and 
Satvin, Proc. Zool. Soc. Lond., 1871, 574 (monogr.).—Saunpers, Proc, 
Zool. Soc. Lond., 1878, 182 (monogr.); Journ. Linn. Soc., Zool., xiv, 1878, 396 
(range); Cat. Birds Brit. Mus., xxv, 1896, 225 (San Jose and Chiapam, Guate- 
mala, Jan.; Salt Spring Island, Fort Rupert, and Esquimault, Brit. Colum- 
bia, etc.)—Dranz, Bull. Nutt. Orn. Club, iv, 1879, 30 (descr. albinistic 
spec.).—Ripeway, Proc. U. 8. Nat. Mus., iii, 1880 (Cat. N. Am. Birds), 207; 
Nom. N. Am. Birds, 1881, no. 672.—Covss, Check List, 2d ed., 1882, no. 
781.—Bairp, Brewer, and Ripeway, Water Birds N. Am., ii, 1884, 252.— 
AMERICAN OrnirHotoaists’ Union, Check List, 1886, and 2d ed., 1895, 
no. 57; 3d ed., 1910, p. 40—Evermann, Auk, iii, 1886, 88 (Ventura Co., 
California).—Biake, Auk, iv, 1887, 329 (Santa Cruz Island, California).— 
Nexson, North Am. Fauna, no. 14, 1899, 23 (Isabella Island, Tepic, April 
23; habits, etc.).—Brewster, Bull. Mus. Comp. Zool., xli, no. 1, 1902, 21 
(Cape San Lucas, La’ Paz, San Jose del Cabo, and Carmen Island, s. Lower 
California, Sept. 6 to March 13)—WutueTt, Condor, xx, 1918, 122, fig. 1 
(specimens with white primary coverts).—SaLvVIn and Gopman, Biol. Centr.- 
Amer., Aves, iti, 1903, 422 (Mazatlan, Sinaloa; Isabella Islands; Tres Marias 
Islands; Chiapam and San Jose, Guatemala).—Bowtzs, Auk, xxiii, 1906, 
139 (Tacoma, Washington, common summer and fall, but not breeding).— 
GRINNELL (J.), Pacific Coast Avif., no. 11, 1915, 22 (coast California, n. to 
San Francisco Bay, not breeding).—Cooxz, Bull. 292, U. S. Dept. Agric. 
(Biol. Survey, 1915, 49, fig. 24 (range and migrations). 
[Larus] heermanni Gray, Hand-list, iii, 1871, 116, no. 11012, part (California).— 
Scrater and Satvin, Nom. Av. Neotr., 1873, 148.—SHarpz, Hand-list, i, 
1899, 140.—Forses and Rosinson, Bull. Liverp. Mus., ii, no. 2, 1899, 57 
(Mazatlan). 
L{arus] heermanni Cours, Key N. Am. Birds, 2d ed., 1884, 747—Rmeway, 
Man. N. Am. Birds, 1887, 34. 
[Adelarus] heermanni Brucu, Journ. fiir Orn., 1853, 107; 1855, 279 (monogr.). 
[Leucophaeus] heermanni BonaParte, Naumannia, 1854, 211. 
Leucopheus heermanni BONAPARTE, Rev. et Mag. de Zool., 1855, 21. 
[Blasipus] heermanni BonaParte, Compt. Rend., xlii, 1856, 770, Consp. Av., ii, 
1857, 211. 
@ See Cooke, Distribution and Migration of North American Gulls and their Allies, 
1915, 49, 50. 
