DELAFIELD S YELLOW-THROAT. 309 



vex, the edges direct and overlapping, with a very slight notch, the tip 

 narrow ; lower mandible with the angle of moderate length and narrow, 

 the dorsal line ascending and straight, the sides rounded, the edges in- 

 flected, the tip acute ; the gape-line considerably arched. Nostrils basal, 

 lateral, oblong, operculate, exposed. 



Head of moderate size, ovate ; neck short ; body moderately stout. 

 Feet rather long, tarsus slender, longer than the middle toe, much 

 compressed, covered anteriorly with seven scutella, behind with two 

 longitudinal plates meeting so as to form a thin edge ; the lateral toes 

 nearly equal, the third much longer, and united at the base to the fourth, 

 the hind toe large ; claws moderately arched, extremely compressed, with 

 the sides faintly grooved, acute. 



Plumage soft and blended with little gloss. Wings rather long, 

 somewhat concave ; the second, third, and fourth primaries have the 

 outer web cut out towards the end ; the first quill is three and a half 

 twelfths shorter than the second, which is two-twelfths shorter than 

 the third ; the latter is longest, but scarcely exceeds the fourth, and the 

 fifth is only a quarter of a twelfth shorter than it ; the other primaries 

 verv slowly graduated, the longest or third being only five-twelfths 

 longer than the first secondary ; all the quills are rounded. Tail rather 

 long, straight, much rounded, the lateral feathers being half an inch 

 shorter than the middle. 



Upper mandible blackish-brown, with the edges yellowish flesh- 

 colour ; lower mandible of the latter colour, slightly dusky at the point. 

 A band of black passes across the forehead, includes the loral space and 

 eyes, and terminates on the ear-coverts. The upper part of the head 

 is light greyish-blue, tinged behind with green ; the rest of the upper 

 parts dull greyish-olive ; 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, and all the lower parts rich yellow, excepting 

 the sides, which are shaded into dull yellowish-green, and the lower 

 wing-coverts and axillaries, which are nearly white. 



Length to end of tail 5i inches ; bill along the ridge ||-, along the 

 edge of lower mandible A ; wing from flexure 2{^ ; tail 2J ; tarsus \\ ; 

 hind toe ||, its claw ^| ; middle toe \\, its claw {^. 



This species has the bill much stronger and more elongated than 

 the other ; its wings are much more rounded, the first quill being nearly 

 five-twelfths shorter than the third, whereas in 8. Trichas it is scarcely 

 a twelfth and a half shorter ; its tail is more rounded ; and its tarsi 



