892 



APPENDIX. 



COUES KEY, 1884. UNION LIST, 1886. 



771 />(>. Add: Larus marinus schistisagus. Slaty-Backed Gull. Adult: white; 

 mantle dark slate-gray. First primary with a long white tip and a gray wedge on the inner 

 web; second with a subapical white spot on the inner web only, and the gray wedge further 

 down; third with the gray wedge reaching the subapical spot; no gray wedge on outer webs 

 of first four primaries. Feet pinkish flesh-color. Bill yellow, with red spot on gonys. Iris 

 yellowish cream-color. Nearly the size of the last, from which probably not distinct. N. 

 Pacific and Arctic Oceans, coast of Alaska. Bull. U. S. Nat. Mus., No. 20, 1885, p. 67. 



! 51. Larus argentatus. 



77. Hydrochelidon nigra surinamensis. 

 [78.] leucoptera. 



79. Anous stolidus. 



80. Rynchops nigra. 

 00. [Not admitted in the List.] 



809 Ji.s. Add: Diomedea exulans. Wandering Albatross. Adult: White, more 

 or less tinged with yellowish, the flight-feathers dusky, the larger wing-coverts and the back 

 usually barred with blackish. Bill very stout, with deeply concave culmen, and augulated 



