6 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



MotaeUlo, xi'ptentrionali'i Breuu, Vijg. Deutsclil., 1831, "A7. 



Motadlla sylvestris Brkhm, Vog. Deutschl., 1831, 348. 



Motaeilla hrachyrhynchos Brehji, Vog. Deutschl., 1831, 348. 



Motacilla lotor Rennie, in Montague's Orn. Diet., 2d ed., May 24, 1831, 377 (new 



name for M. alba Linnaeus). 

 Motacilla gularis Swainson, Birdn W. Africa, ii, 1837, 38. — Hartlaub, Orn. W.- 



Afr.,'l857, 72. 

 3Iotacilla cervicalw Brkhm, Vogelf., 1855, 143. 

 Motacilla major Brehm, Naumannia, 1855, 280. 

 Motacilla j'aHciata'BvuEE.M, Naumannia, 1855, 280. 



MOTACILLA OCULARIS Swinhoe 

 SWINHOES WAGTAIL. 



Similar to 31. alha, but with a black or dusky streak through qjq 

 and much more of white on wing-coverts. 



Adult male in spring. — Forehead, superciliary, supra-auricular, 

 auricular, and suborbital regions, lores, sides of neck, and under parts 

 posterior to chest white, the sides and flanks shaded with gray; crown, 

 occiput, nape, postocular streak (along upper edge of auricular region), 

 chin, throat, and chest black; hindneck, back, scapulars, and lesser 

 wing-coverts plain ash grav,'' the rump darker, the upper tail-coverts 

 black, or slate-black, with graj^ margins, the shorter ones along each 

 side with outer webs largel}" white; middle and greater wing-coverts 

 with exposed portion white, forming a large patch; tertials with inner 

 webs duskj^ gi'ay, their outer webs darker gray or blackish broadly 

 edged with white; alula, primary coverts, primaries, and secondaries 

 (except tertials) brownish gray narrowly edged with white or pale gray; 

 eight middle rectrices black, the outer web of middle pair narrowly 

 edged with pale gray or white; two outermost rectrices, on each side, 

 white with black along edge of inner web, that on outermost rectrix 

 extending more than halfway to tip, that on the next reaching nfearly 

 to tip; bill, legs, and feet black; iris brown. 



Adult female in spring. — Similar to the adult male, but chin, malar 

 region, and upper throat pure white. 



Young female in first 'winter. — Similar to the spring plumage, but 

 gray of upper parts (especially the back) more brownish; pileum gray, 

 like back, but gradually fading into white on forehead; black of under 

 parts restricted to a crescentic patch on chest; white of sides of head, 

 throat, etc., tinged with yellowish; basal half of maxilla pale brownish. 



Adult 7nale.— length (skins), 186-191 (189.3); wing, 87-92(90); tail, 

 91-94 (92.6); exposed culmen, 12-13 (12.3); tarsus, 24; middle toe, 15.^ 



Adidt female.— Length (skins), 176-198 (18-l:.3); wing, 87-92(89); 

 tail, 83-90 (87); exposed culmen, 13; tarsus, 22-25 (23); middle toe, 

 12-15 (13.3).^ 



Eastern Asia, breeding in eastern Siberia (Tschuktschi Peninsula to 

 Plover Bay), migrating southward to southern China; occasional 



« Nearest to gray no. 6 of my Nomenclature (^f Colors. ^ Three specimens. 



