21)2 LONG-WINGED SWIMMERS — LONGIPENNES. 



Sterna Forsteri. 



FOBSTER'B TESN. 



Stenui hirundo, Sw. & Rich. F. H. A. J I. 1831, 412 (not of Linn.). 



Sterna Foratcri, Nutt. Man. II. 1834, 274 (footnote).— Lawii. in Haird's B. N. Am. 1858, 862.— 



Bairi), Cat. N. Am. B. 1859, no. 691. — C'ouKs, Key, 1872, 321 ; Clu-ck List, 1873, no. 56tJ ; 



2(1 cd. 1882, no. 798 ; Biitls N. W. 1874, 676. — Kidgw. Noui. N. Am. B. 1881, no. 685. 

 Slenia Ilavclli, Auu. Orn. Biog. V. 1839, 122, pi. 409, tig. 1 (young in winter) ; S.vnop. 1839, 318 ; 



B. Am. VIIL 1844, 103, \>\. 434. — Lawk, in Baird's B. N. Am. 1858,861. -Bau;i), C.it. N. 



Am. B. 1859, no. 686. 



Had. North America generally, breeding from interior of British America south to the Poto 

 mac River, Illinois, Southern Texas, Nevada, California, etc. ; niigratiiig south to Brazil. 



Sp. Char. Adult, in suvimcr .- Pileum and nape deep black. Upper jiarts, includim,; .ump 

 and tail, light pearl-gray, the primaries and tail paler and more silvery, the inner webs of tiic 



Adttlt, in summer. 



outer pair of rectrices usually darker (sometimes quite dusky) tor that portion beyond the tip ol 

 the next leather. Inner webs of primaries without any well-defined white space, except on two 

 outer quills, but the edge usually more or less dusky. Tips of secondaries, anterior upjier tail- 

 coverts, sides aud under part of head and neck, and entire lower parts pure white. Bill dull waxy 



hi *' 



«^, 



Adxdt in muter. 



I 



orange, the terminal thlnl or more blackish, with the tip usually paler ; mouth orange ; edges nf 

 eyelids black ; iris dark brown ; legs and feet very fine orange-red, the claws black. Adult, in 

 winter : Similar, but the head and neck white, the occiput and nape more or less tinged with gray- 

 ish, the sides of the head marked by a broad space of black surrounding the eyes and extending 



