462 



BULLETIX 50, TNITED STATES XATIONAL MUSEUM. 



Achat mrtZf.— Wing, 400-422 (411.1); tail, 130-150 (137.9); exposed 

 culmen, 6.5-75 (69.4); tarsus, 40.5-46 (43.2); middle toe, 31.5-36 

 (34.5).« 



Adult female. —Wing, 404-423 (416); tail, 135-148 (140.2); exposed 

 culmen, 64-70 (67.5); tarsus, 40-44 (42.4); middle toe, 32.5-34 

 (33.4).^ 



Nearly cosmopolitan, but not recorded from Japan, Greenland, 

 Iceland, nor Pacific islands; in North America breeding in Mackenzie 

 (mouth of Mackenzie River; Great Slave Lake), coast of southern 

 Labrador, islands of northern Lake Michigan (Gravel Island, etc.), 

 coast of Virginia (Cobb's Island, formerly at least), coast of South 

 Carolina, Mississippi, Louisiana, and Texas (Padre Island), and 

 southern Oregon (Lower Klamath Lake; Tule Lake), probably also 

 (at least formerly) L^tah (Great Salt Lake) and Nevada (Sink of 

 Humboldt River); occurs irregularly or casually nearly throughout 

 North America (locally), northwestward to Yukon Valley and St. 

 Michaels, Alaska, on James Bay, and in Newfoundland; winters 

 on South Atlantic and Gulf coasts of United States and on Pacific 

 coast from central California to Colima, western Mexico; in Eastern 

 Hemisphere breeding in Albania (Dobrudscha), shores and islands of 

 Caspian Sea, western Africa (mouth of Zambesi River), Australia, and 

 Tasmania, and occurs, irregularly or locally, from about latitude 60° 

 N. to southern Africa, Madagascar, Ceylon, Australia, Tasmania, 

 New Zealand, etc. 



Sterna caspia Pallas, Novi Gomm. Acad. Sci. Imp. Petrop., xiv, pt. i, 1770, 582 

 pi. 22, fig. 2 (Caspian Sea^; Zoogr. Rosso-Asiat., ii, 1826, 332. — Bechstein, 

 Naturg. Deutschl* ii, 1791, 825.— Retzius, Fauna Suecica, 1800, 164.— 

 Temminck, Man. d'Orn., 1815, 476; ed. 2, 1820, 738; 4me pte, 1840, 

 454. — NiLssoN, Fauna Suecica, 1817, 155. — Vieillot, Nouv. Diet. d'Hist. 

 Nat., xxxii, 1819, 177.— Brehm, Beitr. Vogelk., iii, 1822, 630; Lehrb. Eur. 



«Ten specimens. 



''Four specimens. 



Localit}% 



MALES. 



One adult male from Germany 



One adult male from Algeria 



One adult male from (ireat Slave Lake, Mackenzie 



Five adult males from eastern United States 



One adult male from California (Tule Lake, July 8) 



One adult male from Sonora (Colorado River, March 28) 



FEMALES. 



One adult female from Great Slave Lake 



Three adult females from eastern United State? 



Wing. Tail. 



400 



416 



402 



415.2 



411 



416 



416 

 416 



136.5 

 140.5 

 145 

 132.6 



144 

 150 



148 

 137.7 



Middle 

 toe. 



34.5 



33.5 



35 



34.3 



35 



36 



32.5 

 33.7 



