350 SYLVIADJl. 



yellow ; all the quill -feathers slate-brown ; the primaries 

 and secondaries with a narrow outer edge of bright yellow, 

 the tertials with a broader edge of yellowish white ; tail- 

 feathers slate -brown, with the outer edge yellow, the 

 central pair rather shorter than the others ; the chin, 

 throat, breast, and flanks, delicate sulphur-yellow ; belly, 

 and under tail-coverts, clear white ; under surface of wings 

 and tail grey ; legs, toes, and claws, brown, sometimes 

 dark brown. 



The whole length of some specimens is five inches and one 

 quarter ; but the average measurement of many specimens 

 is rather less. From the carpal joint to the end of the 

 longest quill-feather, three inches : the first feather very 

 short ; the second feather rather longer than the fifth ; the 

 third the longest of the whole ; the wings when closed 

 reaching over three-fourths of the length of the tail. 



Females do not differ much from males either in size or 

 colour. 



Most of our warblers begin to moult as soon as their 

 breeding season is over, and complete their moult before 

 they migrate ; but Mr. Hoy informs me that the Wood 

 Warblers remain in their old plumage, and migrate before 

 they change their feathers. 



