1. MOTACILLA. 471 



Total length 7*2 inches, eulmen O'oo, wing 3*5, tail 3"55, tarsus 0-85. 

 (Mus. II. Seebohm.) 



This is an eastern form of M. alba, from which it differs in its 

 white shoulders, the white on the median and greater coverts being 

 so broad as entirely to hide the black bases. 



The type is a nearly fuU-plumaged bird ; but Mr. Seebohm has 

 one, killed by himself on the Yenesay in June, which has the black 

 extended right up to the chin and has even the outer tail-feathers 

 pure white save for remains of a blackish fringe to the inner web. 



Hah. Eastern Siberia, probably wintering in India and China. 



a. S fid. sestiv. sk. Lake Baikal. Gould Collection. 



b. (S ad. sestiv. sk. [India.] Gould Collection. 



3. Motacilla ocularis. (Plate IV. figs, 5, 6.) 



Motacilla ocularis, Sivi7ih. Ihis, 1860, p. 55 ; Grm/, Hand-l. B. i. 

 p. 240, no. .3576 (1869) ; Swinh. P. Z, S. 1870, p. 129, 1871, p. 364; 

 Frjer. in Eoioley's Orn. Misc. ii. p. 192 (1877) ; Bavid ^- Otistal. 

 OL Chine, p. 299 (1878) ; Hutne ^- Davison, Str. F. 1878, p. 518 ; 

 Hume, Str. F. 1879, p. 103; Scully, t. c. pp. 312, 315 ; Hume, t.c. 

 p. 413 ; Oates, B. Brit. Burin, i. p. 158 (1883) ; Dyhoicski, Bull. 

 Soc. Zool. France, viii. p. 360 (1883) ; Nelson, Cruise R. S. 'Corwin,^ 

 p. 02, pi. ii. (1833) ; Bidytv. Fr. U.S. Nat. Mns. iv. p. 414 (1882); 

 Cones, Key N. Amer. B. 2nd ed. p. 284 (1884). 



Key to the Plumages o/M. ocularis. 



a. Throat white or white tinged with yellow. 



a'. Only a dusky-brown patch on the fore neck; 



upper parts ashy brownish I'ojtjz^r: first plumage. 



h'. A black crescent on the fore neck. 



a" . Head like the back ; white forehead , -rr 



shghtly indicated \ ^°^^^J '• 



^ -' ( plimiaj 



first winter 



umiao:e. 



h". Head black ; forehead white \ ^'^f^= second winter 



j plumage. 



h. Throat black up to the chin, or uearlv so .... '^'^f ^ ^ = ^"""^'^^^ 

 ^ ' j plumage. 



Young in first plwnaije (Amoy ; E. Swiuhoe). General colour 

 above ashy brown, the lower rump blackish, the upper tail-coverts 

 black with earthy-brown margins, the lateral ones externally duU 

 white ; least wing-coverts like the back, but changing to darker 

 grey ; median wing-coverts white ; greater series white with black 

 bases ; bastard-wing black ; primar3'-covcrts and ijuills black, edged 

 with hoary grey, the secondaries broadly edged with white, the inner 

 ones submarginally browner ; tail-feathers black, the two centre 

 ones edged with white, the two outermost white, black at the base 

 and along the edge of the inner web ; head like the back, with 

 a dusky lino along the sides of the crown ; the forehead paler 

 than the crown, dull white obscured with ashy brown ; a broad 

 white eyebrow along the sides of the crown ; cheeks, ear-coverts, 

 and sides of face white, with a dusky line through the eye ; sides 

 of neck «hite, overshaded with brown ; under surface of body white, 



