462 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Adult male—Wing, 400-422 (411.1); tail, 130-150 (137.9); exposed 
culmen, 65-75 (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) Utah (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 Patuas, Novi Comm. Acad. Sci. Imp. Petrop., xiv, pt. i, 1770, 582 
pl. 22, fig. 2 (Caspian Sea); Zoogr. Rosso-Asiat., ii, 1826, 332.—BEcuHSTEIN, 
Naturg. Deutschl., ii, 1791, 825.—Retzrus, Fauna Suecica, 1800, 164.— 
TremMINcK, Man. d’Orn., 1815, 476; ed. 2, 1820, 733; 4me pte, 1840, 
454.—Nitsson, Fauna Suecica, 1817, 155.—Vie1tot, Nouv. Dict. d’Hist. 
Nat., xxxii, 1819, 177.—Breum, Beitr. Vogelk., iii, 1822, 630; Lehrb. Eur. 
aTen specimens. 6 Four specimens. 
Ex- . 
Locality. Wing. | Tail. | posed | Tarsus.) Middle 
culmen 
MALES. 
One adult male from Germany...............2222200-eeeeeeeee 400 136.5 69 40.5 34.5 
One adult male from Algeria. . 2.22.0... 02.02.0222 cece eee ee eee 416 140. 5 15 43 33.5 
One adult male from Great Slave Lake, Mackenzie............ 402 145 68 43.5 35 
Five adult males from eastern United States...............-... 415.2 | 132.6 69.3 42.6 34.3 
One adult male from California (Tule Lake, July 8)............ 411 144 67 46 35 
One adult male from Sonora (Colorado River, March 28)....... 416 150 69 46 36 
FEMALES. 
One adult female from Great Slave Lake................22..2. 416 148 64 43.5 32.5 
Three adult females from eastern United States................ 416 137.7 68.7 42 33.7 
