266 MOTACJLLA NIGRTCOTIS. 



rt 3 . Mantle bluish grey. 



a 4 . None of the tail-feathers entirely 



white forivoodi. 



b*. Three outer pairs of tail-feathers 



entirely white longicauda. 



b 3 . Mantle ashy olive; chest yellowish 

 white ; a rather broad dusky black 



crop-baud capensis. 



b. Under tail-coverts bright yellow. 



c 1 . Throat and front of chest white with a 



broad black collar fiaviventris. 2 % ( 



d 1 . No black collar. 



e 2 . Outer tail-feather entirely white. Wing 



shorter than tail mclanope. 2 



f 2 . Outer tail-feather not entirely white. 

 Wing longer than tail. 

 c 3 . Upper half of head not jet black. 

 c 4 . Upper half of head yellow or par- 

 tially so in adults ; crown never- 

 grey campesiris. 2 



d*. Upper half of head mostly grey, 

 with no yellow. 

 « 5 . Throat yellow or with only the 

 chin white. 

 a . A complete broad, and distinct, 



white eyebrow flava. ?- 



b°. No pale eyebrow ; ear-coverts 



blackish, subsp borealis. I 



b 5 . Throat white ; generally an imper- 

 fect white eyebrow, subsp. . . cinereicapilla. 

 d 3 . Upper half of head entirely jet black 

 in adults. Some black on the crown 

 at all ages melanocephala. 



Motacilla nigricotis, sp. nov. (PI. 12, fig. 2.) 



Adult Male. Above, black ; a broad white eye-brow from the nostrils to 

 above the ear-coverts separates the crown from the black sides of the head ; 

 sides of neck black with a large white patch ; exposed portion of all but the 

 innermost greater and median-coverts white, with black shaft-stripes to the 

 latter ; base of all but the outer primaries white ; broad outer edges and 

 narrow ends to the secondaries white as well as narrow terminal margins 



