308 DELAFIELD'S YELLOW-THROAT. 



shorter tlian the second, which is half a twelfth shorter than the third, 

 and a little shorter than the fourth, the third being longest ; the other 

 primaries very slowly graduated, the longest or third being only four 

 and a half twelfths longer than the first secondary ; all the quills are 

 rounded. Tail rather long, straight, considerably rounded, the lateral 

 feathers being three-twelfths shorter than the middle ; all the feathers 

 rather narrow and rounded. 



Upper mandible blackish-brown, lower dusky toward the end, the 

 edges of the upper and the basal portion of the lower pale yellowish 

 flesh-colour. Iris dark hazel. Feet flesh-colour. A broad band of 

 black across the forehead, including the loral space and eyes, and ter- 

 minating in a rather pointed form beyond the ear-coverts. Behind this 

 band is a narrow one of very pale blue or bluish-white. The rest of 

 the upper parts yellowish-green, on the head slightly tinged with red ; 

 the quills and tail-feathers wood-brown, the edge of the wing and the 

 margin of the outer primary yellow. The fore part of the neck bright 

 yellow, as is the anterior part of the breast, the abdomen and lower 

 tail-coverts pale, the sides shaded with dull yellowish-green ; the lower 

 wing-coverts and axillaries nearly white. 



Length to end of tail 4f inches ; extent of wings 6^ ; bill along the 

 ridge f'g, along the edge of lower mandible xs ; wing from flexure 2^ ; 

 tail 2i ; tarsus t% ; hind toe |t, its claw ^ ; middle toe ||, its claw ||. 



The female has the upper part lighter, the lower less bright, tinged 

 with reddish-brown, and wants the two bands on the head, which is of 

 a pale brownish-red colour. 



The young male in autumn has the whole of the upper plumage of 

 a rmiform yellowish-green colour, the head being destitute of the black 

 and white markings of the adult ; but there is a narrow black patch 

 behind the eyes. It is in this state that I mistook it for a new species, 

 to which I erroneously gave the name of " Roscoe's Yellow-throat, 

 Sylma Boscoer Plate XXIII. Vol. I. p. 121. The eggs are broadly 

 ovate, rather pointed, eight and a half twelfths long, and six and a 

 half twelfths in their greatest breadth. 



Sylvia Delafieldii. 



Bill longish, nearly straight, conico-subulate, rather broader than 

 high at the base, compressed toward the end, acute ; upper mandible 

 with the dorsal line declinato-convex, the ridge narrow, the sides con- 



