94 
the upper mandible and the basal half of the lower mandible deep 
blood-red ; on either side of the upper mandible, immediately in front 
of the blood-red basal band, is a large buff-coloured plate or lamina, 
continuous with the structure of the billat its base, but separate and 
detached in front, thin on its upper edge, but thicker and projecting 
beyond the edge of the mandible below ; feet slaty blue. 
Total length, 18 inches; bill, 33; wing, 63; tail, 63; tarsi, 1}. 
Hab. Neighbourhood of Quito. 
Remark. The only example I have seen belongs to the collection 
of T. B. Wilson, Esq., of Philadelphia, and which has been kindly 
lent to me by his brother Edward Wilson, Esq., to enrich my Mono- 
graph of the Ramphastide. 
Equally inexhaustible appear to be the Odontophorine or Par- 
tridges of America, for in the.rich Museum of Leyden, I lately found 
a species which was previously unknown to me ; it pertains to the 
genus Odontophorus, and I propose for it the name of Odontophorus 
Columbianus. 
ODONTOPHORUS COLUMBIANUS. 
Crown of the head brown, minutely freckled with black ; back of 
the neck washed with rufous ; over each eye an indistinct mottled 
stripe; throat white, irregularly spotted, especially on the sides, with 
black ; upper surface brown, washed with grey on the centre of the 
feathers, each of which is delicately pencilled with black, and has a 
narrow stripe of buff, bounded on each side by a narrower one of 
black, down the centre; those of the scapularies and wing-coverts 
have moreover a large patch of rich dark brown on the inner web 
near the tip, bounded above by two narrow lines, one of buff, the 
other of dark brown ; primaries brown ; secondaries brown, freckled 
and barred with dark brown, and washed with rufous; tertiaries 
brown, washed with grey and rufous, freckled with black, having a 
broad V-shaped mark of black near the tip, and broadly margined 
and tipped internally with deep buff; under surface reddish brown, 
each feather with a large irregularly-shaped mark of white margined 
with black near the tip ; under tail-coverts, and vent mottled reddish 
brown and sandy buff; bill black ; feet lead-colour. 
Total length, 11 inches; bill, 1; wing, 53; tail, 23; tarsi, 2 ; 
middle toe and nail, 21. 
Hab. Caraccas. 
Remark.—The fine specimen gracing the Museum at Leyden was 
transmitted by M. Landsberger, Netherlands Consul at Caraccas. 
There is also another specimen, from, I believe, the same locality, 
which differs in having the under surface of a nearly uniform greyish 
brown, with here and there a few of the white marks so conspicuous 
in the bird above described; it is also of a somewhat smaller size, 
but notwithstanding these differences, the two birds appear to be one 
and the same species. 
The O. Columbianus has a stouter bill, and is of a larger size than 
O. dentatus, but is smaller than O. Balliviani, to which it is most 
nearly allied. 
