Y THE THICK-BILLED PARTRIDGES. 161 
XIII. THE GORGETED PARTRIDGE, ODONTOPHORUS STROPHIUM. 
Oriyx (Odontophorus) strophium, Gould, P. Z. S, 1843, p. 134. 
Odontophorus strophium, Gould, Monogr. Odontoph. pt. i. pl. 
31 (1844) ; Ogilvie-Grant, Cat. B. Brit. Mus. xxii. p. 442 
(1893). 
Adult.—Top of the head deep brown; nape deep chestnut ; 
mantle reddish-brown with whitish shafts ; primary quills uni- 
form dark brown, the upper-parts otherwise very similar to 
those of O. gucanensis ; chin white ; throat black ,; fore-part 
of neck wAz¢e, margined below by a black band ; general colour 
of under-parts deep rust-red, paler towards the middle, and all 
all spotted with white. Total length, 10°5 inches; wing, 5°8 ; 
tail, 2°5 ; tarsus, 2; middle toe and claw, 2°1. 
It is not known whether the sexes differ in plumage. It is 
possible that the above description may apply to the adult 
female, and that the white shaft-stripes of the mantle may be 
characteristic of that sex, as in O. guttatus. 
Range.—North-western South America ; the United States of 
Colombia. 
XIV. THE CARACAS SPOTTED PARTRIDGE. ODONTOPHORUS 
CCLOMBIANUS. 
Odontophorus columbianus, Gould, P. Z. S. 1850, p. 94; id. 
Monogr. Odontoph. pt. iii. pl. 30 (1850) ; Ogilvie-Grant, 
Cat. B. Brit. Mus. xxii. p. 442 (1893). 
Adult.—Upper-parts very similar to those of the last species, 
O. strophium, but the ¢hroat as well as the chin white, 
barred on the sides wth black, and surrounded by a black 
band widest on the fore-neck; the general colour of the 
under-parts reddish-brown, the white spots being large and 
well-marked. Total length, 11 inches; wing, 5°7 ; tail, 2°5 ; 
tarsus, 1°85 ; middle toe and claw, 2°05. 
It is not known in what particulars, if any, the sexes differ 
in plumage. 
Range.—Northern South America ; Venezuela. 
12 M 
