474 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



xiii, 1890, 137 (La Paz, Lower California, March). — Berlepsch and Stolz- 

 MANN, Proc. ZooL Soc. Lond., 1892, 400 (Callao, Peru). — Loomis, Proc. 

 Calif. Ac. Sci., 3rd ser., ii, 1900, 319 (Monterey Bay, California). — Grinnell, 

 Pacific Coast Avif., no. 3, 1902, 13 (California range); no. 11, 1915, 24 (Cali- 

 fornia; irregular summer and fall visitant north to San Francisco Bay). — 

 Salvin and Godman, Biol. Centr.-Am., Aves, iii, 1903, 407 (Guaymas, 

 Sonora; Mazatlan, Sinaloa; Isabella Island; Gulf of Tehuantepec and San 

 Mateo, Oaxaca; La Union, Salvador; Bay of Fonseca, Honduras; coast of 

 Chile; Corpus Christi, Texas). — Beck, Proc. Calif. Ac. Sci., 4th ser., iii, 1910, 

 64 (Monterey Bay, California, Sept., Oct., 1896). — Brewster, Bull. Mus. 

 Comp. Zool., xli, no. 1, 1902, 24 (La Paz, Lower California, March 14; Mag- 

 dalena Bay, common; Guaymas, Sonora, breeding). 



S[terna] elegans Ridgway, Man. N. Am. Birds, 1887, 40. 



[Sterna] elegans Gray, Hand-list, iii, 1871, 120, no. 11056. — Sharpe, Hand-list, i, 

 1899,135. — Forbes and Robinson, Bull. Liverp. Mus., ii, no. 2, 1899, 54 

 (Chile?). 



T[hallaseus] elegans Gambel, Journ. Ac. Nat. Sci. Phila., ser. 2, i, 1949, 228. 



[Thalasseus] elegans Bonaparte, Compt. Rend., xlii, 1856, 772. 



Thalasseus elegans Coues, Proc. Ac. Nat. Sci. Phila., 1862, 540 (monogr.); Ibis, 

 1864, 389 (Salvador).— Salvin, Ibis, 1866, 198 (Bay of Fonseca, Salvador).— 

 Oberholser, Auk, xxxiv, 1917, 199. 



S[terna] (T) [halasseus] elegans Coues, Key N. Am. Birds, 2d ed., 1884, 760. 



[Phaethitsa] elegans Heine and Reichenow, Nom. Mus. Hein. Orn., 1890, 355, 

 part (Chile). 



(?) [Thalasseus] gayi Bonaparte, Compt. Rend., xlii, 1856, 772 (Chile). 



[Sterna] gayi Gray, Hand-list, iii, 1871, 119, no. 11049. 



Sterna comata Philippi and Landbeck, Wiegmann's Archiv fiir Naturg., xxix, 

 1863, pt. 1, 126 (Chile). 



Sterna galericulata (not of Lichtenstein) Finsch, Abh. nat. Ver. Bremen, i, 1870, 

 359 (Mazatlan, Sinaloa). — Sclater and Salvin, Proc. Zool. Soc. Lond., 1871, 

 568-9, part, fig. 2. — Coues, Check List, 1873, no. 563. — Lawrence, Mem. 

 Bost. Soc. N. H., ii, 1874, 317 (Mazatlan, Sinaloa; Isabella Island). 



[Sterna] galericulata Coues, Key N. Am. Birds, 1872, 320. — Sclater and Salvin, 

 Nom. Av. Neotr., 1873, 147. 



Sterna {Thalasseus) galericulata Coues, Birds Northwest, 1874, 671 (monogr.). 



(?) Sterna maxima (not of Boddaert?) Bailey (H. H.), Auk, xxiii, 1906, 377 

 (Isabella Island, Tepic, w. Mexico, breeding). 



THALASSEUS EURYGNATHUS (Saunders). 



CAYENNE TERN. 



Adults in hreeding (?) 'plumage (sexes alike). — ''Identical with the 

 preceding [T. elegans] in plumage, but the bill is lemon-yellow and the 

 angle of the gonys is immediately below or very little in front of the 

 anterior end of the nostril; the hind parts of the tarsi, the soles, and 

 the claws are dull yellow. To'tal length 17.5 inches [444.5 mm.], 

 culmen 2.7 [68.58 mm.], wing 12.1 [307.34 mm.], tail 6.5 [165.1 mm.], 

 tarsus 1.1 [27.94 mm.], middle toe and claw 1.2 [30.48 mm.]."« 



Young. — Forehead, crown, and occiput white, the last, together 

 with posterior portion of crown, streaked with dull blackish; nape 



o I have not seen an adult of this species, and therefore copy the above description 

 from Saunders, Cat. Birds Brit. Mus., xxv, 1896, 85. 



