HYPOCNEMOIDES. 69 



This genns is distinguished chiefly by its short tail and the 

 long upper tail-coverts which cover half its length. The wing is 

 ronndedj the fourth, fifth, and sixth primaries longest and the 

 third about equal to the eighth. Coloration : male and female 

 similar. 



392. Hypocnemoides melanopogon. 



Black-chikned Ant-Creeper. 



Hi/jjocyiemis melanopogon Sclater, P. Z. S. 1857, p. 130 (Chamicnrros) ; 

 Salvin, Ibis, 1885, p. 428 (Camacusa) ; Sclater, Cat. B. Brit. Mus. 

 XV. p. 290, 1890 (auiana) ; Brabourne & Chubb, B. S. Amer. i. p. 212, 

 no. 2139, 1912. 



Adult male. General colour above dark slate-colour ; upper 

 wing-coverts black margined with greyish white ; inner webs of 

 flight-quills dark brown ; tail-feathers black edged with white at 

 the tips; throat black; remainder of the tinder surface slate-grey, 

 paler on the under tail-coverts and under wing-coverts. 



Total length 105 mm., exposed culmen 16, wing 63, tail 32, 

 tarsus 21. 



The male described was collected on the Anarica River. 



Adult female. Similar to the adult male above, but differs on 

 the under surface in having the throat white with very slight 

 dark edges to the feathers, instead of uniform black, the feathers 

 on the back tipped with ash-grey, and the abdomen white instead 

 of slate-grey. Wing 62 mm. 



The female described was also collected on the Aliarica River. 



An immature male, collected on the Ituribisi River in October 

 1908, has the throat blackish with white bases to the feathers, 

 which imparts a spotted appearance. 



Breeding-season. Unknown in British Guiana. 



Neft. Unrecorded in British Guiana. 



Kfigs. Undescribed from British Guiana. 



Range hi British Guiana. Upper Takutu Mountains, Ituribisi 

 River, Bartica, Bonasika River, Anarica River, Great Falls Deme- 

 rara River, Arawai River (Mci'onnell collection) ; Kamakusa 

 ( Whiteh)). 



Extralimital Range. Surinam {Penard), Nortli-west Brazil and 

 Venezuela. 



TLd'ils. Unrecorded in Brifish Tliiiana. 



