TIIR THICK-BILLED PARTRIDGES. 1 57 



Young Females. — Apparently resemble the male pa7'ent^ and 

 have the whole of the under-parts rust-coloured. 



Range. — North-western South America ; United States of 

 Colombia. 



VI. THE RUFOUS-BREASTED PARTRIDGE. ODONTOPHORUS 



SPECIOSUS. 



OdontopJwriis speciosus^ Tschudi, Wiegm. Arch. 1843, P- 3^7 ; 

 id. Fauna Peruana, p. 281, pi. xxxiii. (1844-46); Gould, 

 Monogr. Odontoph. pt. iii. pi. 25 (1850); Ogilvie-Grantj 

 Cat. B. Brit. Mus. xxii. p. 437 (1893). 



Adult Male. — Like the male of O. hyperythi-us but dis- 

 tinguished by having the general colour of the top of the head 

 and upper-parts dark reddish-brown ; the back of the neck and 

 mantle with pale buff shaft-stripes ; viotthd black atid white 

 eyebrow-stripes, and black chin and throat. Under-pai ts bright 

 rust-red. Total length, 10 inches; wing, 57; tail, 2-2; tarsus, 

 I "8 ; middle toe and claw, I'g. 



Adult Pemale. — Differs from the male in having the breast and 

 belly dai'k grey- Size rather smaller. 



Range. — Western South America ; Ecuador and Peru. 



VII. THE BLACK-EYEBROWED PARTRIDGE. ODONTOPHORUS 



MELANONOTUS. 



Odoutophorus melanonotus^ Gould, P. Z. S. i860, p. 382 ; 

 Ogilvie-Grant, Cat. B. Brit. Mus. xxii. p. 438 (1893). 



Adult. — General colour of the upper-parts deep brownish- 

 black indistinctly mottled with pale rufous; eyebrow-stripes dark 

 brownish-black ; chin, throaty and upper breast deep rust-red ; 

 rest of under-parts like the back, but with more strongly marked 

 sa?idy mottlings. Total length, 10 inches; wing, 5-5; tail, 

 2*1 ; tarsus, 2 ; middle toe and claw, 2"i5. 



Nothing is known of the life history of this rare bird, and. 



