BIEDS OF NORTH AND MIDDLE AMERICA. 623 



Ibis, 1863, 152 (Mackenzie River).— Elliot, New and Unfig. N. Am. Birds, 

 pt. 7, 1867 (vol. ii), pi. 52, lower fig., and text. — Henshaw, Ann. Lye. N. Y., 

 xi, 1875, 13 (Utah); Birds Hawaiian Is., 1902, 127 (] spec, locality unknown). — 

 RiDGWAY, Bull. Essex Inst., vii, 1875, 16 (Pyramid Lake, Nevada, breed- 

 ing), 32 (Great Salt Lake, Utah, breeding); Om. 40th Parallel, 1877, 637; 

 Proc. U. S. Nat. Mus., iii, 1880 (Cat. N. Am. Birds), 207; Nom. N. Am. Birds, 

 1881, no. 668.— Bendire, Proc. Bost. Soc. N. H., xix, 1877, 148 (Malheur 

 Lake, e. Oregon, breeding). — Saunders, Proc. Zool. Soc. Lond., 1878, 175 

 (monogr.); Cat. Birds Brit. Mus., xxv, 1896, 276 (V'ancouver Island and 

 Esquimault, Brit. Columbia; Yellowstone Lake, Aug.; etc.).— Beldinq, 

 Proc. U. S. Nat. Mus., v, 1883, 549 (San Jose del Cabo, Lower California, 

 May 17). — Baird, Brewer, and Ridgway, Water Birds N. Am., ii, 1884, 

 242.— Ferrari-Perez, Proc. U. S. Nat. Mus., ix, 1886, 179 (Alvarado, Vera 

 Cruz). — American Ormithologists' Union, Check List, 1886, and 2d ed., 

 1895, no. 53; 3rd ed., 1910, p. 39.— Townsend, Proc. U. S. Nat. Mus., x, 1887, 

 191 (Eagle Lake, California, breeding). — Cooke, Bird Migr. Miss. Val., 1888, 

 56 (Reno Co., Kansas, 1 spec, Oct. 20, 1880); Bull. 56, Col. Agric. Exp. Sta., 

 1900, 192 (Middle Park, Colorado, 7,000 ft., April 24; Denver, Oct. 26); Bull. 

 292, U. S. Dept. Agric (Biol. Surv.), 1915, 41, fig. 21 (range and migrations). — 

 MacFarlane, Proc. U. S. Nat. Mus., xiv, 1891, 418 (lower Anderson River, 

 Mackenzie, breeding). — Richmond and Knowlton, Auk, xi, 1894, 301 (Jef- 

 ferson River, Montana, Sept.). — Brewster, Bull. Mus. Comp. Zool., xli, 

 no. 1, 1902, 20 (La Paz, etc., Lower California, in winter). — Salvin and God- 

 man, Biol. Centr.-Am., Aves. iii, 1903, 425 (Valley of Mexico; Alvarado, Vera 

 Cruz; San Mateo, Oaxaca). — Seton, Auk. xxv, 1908, 69 (Great Slave Lake, 

 Mackenzie, abundant). — Preble, North Am. Fauna, no. 27, 1908, 267 (Great 

 Slave Lake, breeding; Fort Resolution).— Grinnell (J.), Pacific Coast Avif., 

 no. 4, 1915, 22 (California; winter visitant to whole of State, breeding at Eagle 

 Lake, T^assen Co.; occasional in summer from Lake Tahoe northward). 



L[anis] californicus Coues, Key N. Am. Birds, 2d ed., 1884, 745. — Ridgway, Man. 

 N. Am. Birds, 1887, 31. — Bryan, Key Birds Hawaiian Group, 1901, 7 (Ha- 

 waiian Islands, accidental). 



[Larus] californiais Sharpe, Hand-list, i, 1899, 142. — Forbes and Robinson, 

 Bull. Liverp. Mus., ii, no. 2, 1899, 58. 



[Laroides] californicus Bonaparte, Compt. Rend., xlii, 1856, 770; Consp. Av., ii, 

 1857, 220. 



[Larus delaivarensis .] Var. californicus Coues, Key N. Am. Birds, 1872, 313. 



Larus delawarensis . . . var. californicus Coues, Check List, 1873, no. 548a. 



L[arus] argentatus, var. californicus Ridgway, Bull. Essex Inst., v, Nov., 1873, 

 173, 195, in text (Pyramid Lake, Nevada; Great Salt Lake, Utah); vii, 1875, 

 40 (Nevada). 



Larus delawarensis (not of Ord) Allen (J. A.), Bull. Mus. Comp. Zool., iii, 1872, 

 173, 183 (Great Salt Lake, Utah, breeding). 



LARUS DELAWARENSIS Ord. 



RING-BILLED GULL. 



Adults in summer (sexes alike). — -Head, neck, rump, upper tail- 

 coverts, tail, and entire under parts, including axillars and under 

 wing-coverts, immaculate pure white; back, scapulars, and wings 

 uniform pale gray (between pale neutral gray and no. 8 gray), the 

 tertials, secondaries, and proximal primaries rather broadly, but not 



