I.'). I,ART-S. 1S5 



restricted to the inner web ; (Ith and upwards grt'}", witli paler tips 

 and inner borders ; under winn;-coverts grey, white round the edge 

 of the wing : bill short and stout, black, with a ruddy tinge on the 

 lower mandiblo ; tarsi and toes reddish, the claws rather long, the 

 webs considerably incised. Total length 12-6 inches, culmen 1-4, 

 wing 11, tail -i-A, tarsus I'B, middle toe with daw 1'25. 



The sexes appear to be alike externally. 



Adult in luinter. Like the above, except as regards the head, 

 which is white, slightly streaked with grey. 



Immature. Like the above, except that there is a small black sub- 

 terminal spot or half bar on the outermost (juill, and a narrow blackish 

 line on the margin of the inner web of the (Jth quill (ascending). 



Young. Similar to the above, but the upper wing-coverts and the 

 long inner secondaries arc mottled with brown ; the tail has a 

 narrow subterminal band of brown ; the black on the four outer 

 primaries extends to the tips and along the greater part of the 

 outer webs : the bill, tarsi, and toes dull brown. 



Hah. Inland waters of China and Mongolia, visiting the coast in 

 winter; Nagasaki, Japan (fide //. Whiteli/); Corea, and Eastern 

 Siberia as far north as the mouth of the Amoov (TaczayiowsH). 



a. (S ad. sk. 0-seu-keo, Amoy, China, Feb. II. Seebohm Coll. 



23 {JR. Swinhoe). (Type of sjjec-ies.) 



b. Juv. sk. Amoy, China, Dec. {R. S.). H. Seebohm Coll. 



c. c? ad. sk. Amoy, China, Feb. {R. S.). II. Saunders Coll. 

 (/. Imm. St. Nagasaki, Japan {H. W'hitelij). Purchased. 



5. Larus Philadelphia. 



Sterna Philadelphia, Ord, in Guthrie's Geoyr. 2nd Amer. ed. ii. p. 319 



(1815). 

 Larus minutus {nee Pall), J. Sabine, Aj)p. Franklins Polar Sea, 



p. 696 (1823) ; Siv. ^-Pich. Faun. Bor.-Amer., Birds, p. 426 (_1831). 

 Larus capistratus {nee Tevim.), Bp. Speech. Comp. p. 69 (1827) ; id. 



Synopsis in Ann. Lye. N. Y. ii. p. 358 (1828); Nutt. Man. Orn. 



ii. p. 290 (1834). 

 Larus melanorh^Tlchus, Tenwi. PL Col. livr. 85, tab. 504 (1830 : 



'■ Chile ■' [?]) {Gray, Gen. B. iii. p. 654 (1846). 

 Larus bonapartii, Sicains. S,- Richards. Faun. Bor.-Amer., Birds, 



p. 425, pi. 72 (1831) ; Kutt. Man. Orn. ii. p. 294 (1834) ; Aubub. 



Orn. Bioyr. iv. p. 212, pi. 324 (1838) ; id. Synops. p. 323 (1839) ; 



id. B. Amer. 8vo ed. vii. p. 131, pi. 442 (1844) ; Giraud, B. 



Lonylsl. p. 359(1844) ; Graif, Gen. B. iii. p. 654(1846) ; Thompson, 



Ann. Nat. Hist. 1848, p. 192 (near Belfitst) ; Deyl. Orn. Eur. ii. 



p. 328 (1849) ; Thotnpson, B. Irel. iii. p. 317 (1851) ; Yarr. Brit. 



B. 2nd Siippl. p. 55 (1856) ; Sehl. Mus. P.-Bas, Lari, p. 41 (1863) ; 



Dei/l. et Gerbe, Orn. Fur. ii. p. 439 (1867) ; R. Gray, B. West 



Scvtl. p. 473 (1871) ; Gdtke, Voyelw. Hekjol. p. 577 (1891). 

 Xema bonapartii, Bp. Comn. List B Eur. S,- N. Amer. p. ^i^ (1838) ; 



Richards. Joi/rn. Boaf-J'oy. Rupert' s-Ld. i. pp. 155,200(1851: 



(it. Slave Lake, nesting on trees). 

 Gavia bonapartii, Macyill. Br.B.v. p. 610 (1852) ; Bp. Naumannia, 



1854, p. 213 ; id. C. R. xhi. p. 771 (1856) ; Blasius, J.f. 0. 1865, 



p. 371 (revision). 



