434 BIEUS OF BRITISH GUIANA. 



upper back, wings, tail, and throat glossy black; lower back, 

 rump, and short upper tail-coverts grey with black tips to the 

 feathers, paler and inclining to white on the last; inner webs of 

 flight-quills for the greater part white, a few of the primaries are 

 marked with white on the outer web which forms a small wing- 

 speculum ; a line of white from the base of the upper mandible 

 along the middle of the crown to the nape ; cheeks, breast, abdo- 

 men, under tail-coverts, axillaries, under wing-coverts, and basal 

 portion of the quills below white ; outer margin of wing below 

 more or less blackish ; under surface of flight-quills and lower 

 aspect of tail blackish. 



Total length 111 mm., exposed culmen 7, wing 57, tail 43, 

 tarsus 13. 



The male described was collected on the Abary River in Sep- 

 tember 1906. 



Adult female. General colour of the upper surface olive-brown 

 including the crown of the head, sides of the face, hind-neck, 

 entire back, wings, and tail ; throat, breast, and sides of body 

 isabelline-buff ; abdomen, under tail-coverts, axillaries, and under 

 wing-coverts buffy-white. Wing 54 mm. 



The female described was collected on the Supenaam River in 

 1911. 



A young female from the Supenaam River is similar to the 

 adult female in many respects but everywhere darker ; the adult 

 plumage is shown by the white line on the middle of the head 

 being slightly indicated on the forehead, the black on the lores, 

 the white on the cheeks, and a few minute black spots on the 

 chin. The last remains of the immature plumage appear to be 

 the pale buff wash on the under surface. 



Breeding-season. Unknown in British Gruiana. 



If^est. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Supenaam River, Abary River 

 (McConnell collection) ; Merum6 Mountains, Kamakusa, KamSir 

 rang River ( 1^ Atft'Z?/) ; Georgetown (QweZf/t) ; 'Qasiica, {Beehe). 



Extralimital Range. Surinam (Penard), Venezuela, East Brazil, 

 Peru, Bolivia, Argentina. 



Habits. Unrecorded in British Guiana. 



