640 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Zool., xv, 1908, 310 (Surinam; Brit. Guiana; n. Brazil).—BaRrevt, Auk, 
xxix, 1912, 99 (Marshfield, Massachusetts, May 30 and July 29, 30, 1911),— 
Brooxs (W. 8.), Auk, xxix, 1912, 531 (Manomet Point, Massachusetts, 
abundant in August, 1912)—Bunxer, Kansas Univ. Sci. Bull., vii, 1913, 
139 (Douglas Co., Kansas, 1888, 1901, 1905, 1906, 1911; 5 spec.).—JEWELL, 
Auk, xxx, 1913, 423 (near Colon, Panama, Dec.).—WetmoreE, Bull. 326, 
U.S. Dept. Agric., 1916, 45 (Porto Rico, Vieques, and Culebra; breeding?; 
food). 
Larus] atricilla Keyseriine and Brasius, Wirb. Eur., 1840, pp. xevi, 243. 
Gray, Gen. Birds, iii, 1846, 654.—Wiu1s, An. Rep. Smithson. Inst. for 1858 
(1859), 286 (Nova Scotia, rare) —Newron (A. and E.), Handb. Jamaica, 1881, 
117.—Ripaway, Man. N. Am. Birds, 1887, 35. 
Larus atricilla atricilla Nopuz, Bull. Mus. Comp. Zool., Ix, Aug., 1916, 367 (Guade- 
loupe, Aug., Sept.). 
Larus (Chrecocephalus) atricilla Cours, Birds Northwest, 1874, 650. 
L{arus] (Chroicocephalus) atricilla Ripeway, Ann. Lyc. N. Y., x, 1874, 391 (Illinois). 
Gavia atrwilla Macetttivray, Man. Brit. Orn., ii, 1842, 240; Brit. Birds, v, 1852, 
585. 
Gavia] atricilla Buasius, Journ..fir Orn., 1865, 378. 
[Chroicocephalus] atricilla Bruca, Journ. fiir Orn., 1853, 106.—LicaTenstem, 
Nom. Av. Mus. Berol., 1854, 98 (Porto Rico). 
[Chroiococephalus] atricilla Gunpuacs, Journ. fiir Orn., 1861, 348. 
Chroicocephalus atricilla Capanis, Journ. fiir Orn., 1857, 235 (Cuba). Lawrence, 
in Baird, Rep. Pacific R. R. Surv., ix, 1858, 850; Ann. Lyc. N. Y., viii, 1864, 
103 (Sombrero); viii, 1867, 299 (vicinity New York City); Mem. Bost. Soc. 
N.H., ii, 1874, 317 (Mazatlan, Sinaloa):*Bull. U.S. Nat. Mus., no. 4, 1876, 51 
(Juchitan, Ventosa, and San Mateo, Oaxaca, Aug.—Feb.).—Barrp, Cat. N. 
Am. Birds, 1859, no. 667; Rep. U. S. and Mex. Bound. Surv., ii, pt. ii, 1859, 
27 (Brazos, Texas).—Scrater and Savin, Ibis, 1859, 233 (Belize, Brit. 
Honduras, breeding).—Waeaton, Ohio Agric. Rep., 1860, no. 268 (s. Ohio). 
—GunDLAcH, Journ. ftir Orn., 1862, 94 (Cuba); 1874, 314 (Porto Rico); 1878, 
385 (Cuba; habits); 1878, 162, 191 (Porto Rico}; Orn. Cubana, 1876, 308; Anal. 
Soc. Esp. Hist. Nat., vii, 1878, 408 (Porto Rico).—Covzs, Proc. Ac. Nat. Sci. 
Phila., 1862, 309 (monogr.); Check List, 2d ed., 1882, no. 786.—ScuarTer, Proc. 
Zool. Soc. Lond., 1864, 179 (near City of Mexicc).—Satvin, Ibis, 1864; 388 
(Chiapam, Guatemala; both coasts Central America).—Dresser, Ibis, 1866, 
44 (Galveston, Texas).—ZELEDON, Cat. Aves de Costa Rica, 1882, 36.—STEARNS 
and Cougs, New England Bird Life, ii, 1883, 351.—Sraut, Ornis, vol. 3, 1887, 
453 (Porto Rico). 
C[hroicocephalus] atricilla Ripcway, Ann. Lyc. N. Y., x, 1874, 391 (Illinois) — 
Couzs, Key N. Am. Birds, 2d ed., 1884, 750. ’ 
Chroecocephalus atricilla Newton (A. and E.), Ibis, 1859, 371 (near St. Croix and 
St. Thomas, Greater Antilles).—Covuzs, Proc. Ac. Nat. Sci. Phila., 1866, 99 
(Colorado River, etc., Arizona); 1871, 40 (Fort Macon, North Carolina).— 
ALLEN, Bull. Mus. Comp. Zool., ii, 1871, 366 (e. Florida).—Mzrritt, Proc. 
U.S. Nat. Mus., i, 1878, 172 (Fort Brown, Texas, breeding near coast and on 
prairies). 
Chroecephalus atricillus Verriiu, Proc. Essex Inst., iii, 1862, 159 (coast of Maine, 
resident; a few breeding on islands). 
Larus (Chrococephalus) atricilla Cours, Birds Northwest, 1874, 650 (monogt.). 
Xema airicilla Born, Isis, 1822, 563—Govu.p, Birds Europe, v, 1837, pl. 426 and 
text.—Bonaprarte, Geog. and Comp. List, 1838, 62.—Gnray, List Birds Brit. 
Mus., Anseres, 1844, 437.—Gossx, Birds Jamaica, 1847, 437.—JARDINE, 
Contr. Orn., 1849, 86 (Bermudas, 1 spec.).—Huropis, Jardine’s Contr. Orn., 
1850, 13 (Bermudas?).—A.Brecut, Journ. fir Orn., 1862, 207 (Jamaica). 
