WARBLER. 133 



white at the vent; quills blackish, edged with white; tail more than 

 one inch and half long, black, but the two outer feathers are white. 

 Supposed to be the male of the last, but the length of tail in PI. 

 enlum. is different, though similar in appearance. M. d'Azara's 

 bird appears somewhat like this, as compared thereto by his anno- 

 tator ; but as these two birds inhabit places so widely distant, we 

 must suspect them to be different species. 



158— BLACK-BACKED WARBLER. 



Sylvia obscura, Gm. Lin. i. 978. Gmel. reisc, iv. 178. Pall. n. nord. Beytr. iv. 56, 

 Black-backed Warbler, Gen. Syn. Sup. ii. 245. Shaw's Zool. x. 634. 



SIZE of a Nightingale. Bill rather triangular, brown ; irides 

 yellow ; eyelids naked ; crown and hind part of the neck greyish 

 brown ; back and rump cinereous grey, the feathers chestnut brown 

 in the middle, with dusky tips ; head and neck before, dull yellowish 

 grey ; belly and vent mixed grey and white ; wing coverts as the 

 back, marked with a pale yellow spot at the tips; quills dusky, 

 margined with chestnut brown; tail the same; legs dusky. 



Inhabits the mountainous parts of Russia. 



159 —SUSAN WARBLER. 



Motacilla ochrura, G?n. Lin. i. 978. Gmel. reise, iii. 101. t. 19. f. 3. 



1 



THE head in this species is ash-colour ; nape and part of the 

 back deep black ; throat and breast glossy black ; belly yellow. 

 Inhabits the mountainous parts of Persia. 



