THE THICK-BILLED PARTRIDGES. 153 



takes itself to the branches of trees. It has two distinct notes ; 

 one a rather loud whistling call, which may be heard at morn- 

 ing and evening, the other a sound like "Tock'ro," whence its 

 Macusi name. It is also known as the Duraquara. 



Mr. T. K. Salmon writes : — " When wandering one morning 

 in the forest I saw a pair engaged in the work of nest-making. 

 The male was in the nest ; and the female appeared to be 

 building around him. The female made off at my approach, 

 but the male continued in the nest until I nearly put my hand 

 on him, no doubt trusting to his dark colour among the leaves 

 to escape dele::tion. I do not think I should have seen him 

 had it not been for the scarlet over the eye." 



Nest. — Builds its nest into a bank or side of the ground in 

 the high forest, with a tunnel-like entrance made of interlaced 

 twigs and sticks, or, perhaps, more properly speaking, with a 

 neaily executed bow in front of the nest, which is merely a hole 

 scraped in the ground and lined with dead leaves. {Salmon.) 



Eggs.— Six to eight in number; white; measurements, 1-5 

 by IT inch. 



SUB-SP. a. THE MARBLED PARTRIDGE. ODONTOPHORUS 

 MARMORATUS. 



Orfyx {Odoiitophorus) marmoj-atus, Gould, P. Z. S. 1843, P- 



107. 

 Odoiitophorus pachy?'kynchus, Tschudi, Fauna Peruana, p. 282 



(1844-46); Gould, Monogr. Odontoph. pt. iii. pi. 24 



(1850). 

 Odoiitophorus juarnwratus, Ogilvie-Grant, Cat. B. Biit. Mus. 



xxii. p. 433 (1893). 



Adult Male and Female. — Appear to be distinguished from O. 

 guianensis by having the sides of the head and chin rust-red, 

 and the general colour of the under-parts darker, and almost 

 invariably barred with black and buff. The sexes do not 

 appear to differ in size, and the riieasuremeiits are rather larger 



