Zoological Society. 201 
wing, and shorter Regulus-like bill. Above uniform olive-brown ; 
laterally pale slaty and below pure white; cap clear brown-red or 
chestnut. Dwells near the snows, like the last-named. Length, 
4t inches; bill, 4; tail, 23;; wing, 1}%; tarse, 2; central toe and 
nail, 3; hind, ;%. 
Allied to the last two species are some more Cachar birds of very 
similar manners and plumage, distinguished by a compressed bill, 
which is raised between the keeled nares, as in our Stachyris, and 
by the inner toe and nail of their strong ambulant feet being longer 
than the outer toe and nail. Some have the tarse smooth and the 
tail more or less scansorial, that is, cuneate in form and rather rigid 
or worn; these I call Tribura. The others have the turse scutellate 
and rather longer, and the tail broad and fan-shaped, and not at all 
rigid or worn; these I style Horornis, though they hardly deserve 
subgeneric separation. 
Genus Tribura, mihi. 
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 gra- 
dated, three next subequal and longest ; tail more or less elongated, 
and gradated throughout, rather cuneate than fan-shaped, and some- 
what rigid or worn ; tarse stout, smooth, longer than the mid toe and 
nail; toes and nails simple, compressed, inner fore with its nail ex- 
ceeding the outer fore, central elongate, hind least ; nails acute. 
Type, T. luteoventris, mihi. 
Tribura luteoventris, mihi.—Above olive-brown, with a luteous 
lustre ; below lutescent laterally and albescent centrally; a pale line 
over the eye ; bill dusky horn; legs carneous. Length, 53 inches ; 
bill, 5%; tail, 22; wing, 2,; tarse, 13; central toe and nail, 13; 
hind, ;§;- Inhabits the Cachar, among brushwood; manners un- 
known. 
Genus Horornis, mihi. 
General structure of Tribura, but the rictus more or less armed ; 
the tarse strongly scaled ; the wings more gradated, having the fifth 
or sixth longest, and the tail broad, fan-shaped, and not worn or rigid. 
Inhabits the northern hills ; manners unknown. 
Types, fortipes and flaviventris. 
H. fortipes, mihi.—Above olive-brown, dark and pure; below and 
the brow yellowish ; bill yellow horn; legs pure fleshy. Length, 4% 
inches; bill, $; tail, 2; wing, 2; tarse, 13; central toe and nail, 
14; hind, 5%. 
H., flaviventris, mihi.—Very similar to the last, but a smaller bird, 
with shorter tarse ; above olive-brown; below and the brow greenish 
yellow and pale; bill and legs fleshy. - Length, 42 inches ; bill, 3; 
tail, 13; wing, 2; tarse, +3; central toe and nail, +4; hind, 5%. 
H. ? fuligiventer, mihi.—Aberrant ; probably a Tribura, having the 
wing of that form, but the tail not worn or rigid, and hence perhaps 
