“Bill to gape equal to head or less, straight, cylindric, compressed; at base higher than broad, and having the ridge raised and keeled between the oval apert nares; tip of upper mandible scarcely inclined but distinctly notched; rictus smooth; wings short and feeble but not much or equally gradated; first two quills conspicuously gradated, three next subequal and longest; tail more or less elongated and gradated throughout, rather cuneate than fan-shaped and somewhat rigid or worn; tarsi stout, smooth, longer than the mid toe and nail; toes and nails simple, compressed, inner fore with its nail exceeding the outer fore, central elongate, hind least; nails acute.” (Hodgson.)

553. TRIBURA SEEBOHMI (Grant).
SEEBOHM’S GRASS WARBLER.

Luzon (Whitehead).

“Seebohm’s grass warbler belongs to the section of the genus Lusciniola in which the first primary is half or more than half the length of the second, the sides of the head and ear-coverts brown, the throat pure white and devoid of spots, and the tail considerably longer than the wing.

“Clearly the nearest allies to this species are L. luteiventris and L. mandellii. In these three species the wing-formula is as follows:

“L. luteiventris. Fourth quill slightly longer than, rarely subequal to, the fifth; third intermediate between fifth and sixth.

“L. mandellii, L. seebohmi. Fifth somewhat longer than the fourth and sixth, which are subequal, and distinctly longer than the third.

“The present species differs from both its allies in having the general color of the upper parts browner, the white on the chin and throat more extensive and shading into grayish on the sides of the neck; while the sides and flanks are more grayish brown in tint and but slightly washed with buff; the lower mandible appears to have been yellowish white, as in L. luteiventris. Length, 147; wing, 51; tail, 63.5; tarsus, 20; middle toe with claw, 19.” (Grant.)