224 BIRDS OF BRITISH GCIANA. 



497. Horizopus ardesiacus. 



Lafresnaye's Peeweb. 



Tyrannula ardesiaca Lafresnaye, Eevue Zoologie, 1844, p. 80 (Colombia). 

 Contopus ardesiacus Salvin, Ibis, 1885, p. 298 (Roraima, 5000-6000 ft. ) ; 



Sclater, Cat. B. Bi-it. Mus. xiv. p. 237, 1888 (Twek-quey Mt., 



Cama,rang River). 

 Sorizojaus ardesiacus Brabourne ■ & Chubb, B. S. Amer. i. p. 301, 



no. 3069, 1912. 



Adult female. General colour above and below dark slate-grey; 

 greater upper ■wing-coverts dark brown edged with slate-colour 

 at the tips ; bastard-wing, primary-coverts, and flight-quills 

 blackish brown, the last paler on the edges o£ the inner webs ; tail 

 dark brown ; crown of head darker than the back and inclining to 

 black ; under surface of body rather paler than the back ; 

 axillaries and under wing-coverts dusky brown. 



Total length 154 mm., exposed culmen 17, wing 85, tail 70, 

 tarsus 12. 



The specimen from which the description is taken was collected 

 by Mr. McConnell at Mount Roraima in October 1898. 



Adult male. Differs from the adult female in being darker in 

 colour and rather larger in measurement. Wing 90 mm. 



The male, which is in the British Museum, was 'collected by 

 the late Henry Whitely at Twek-quey Mountain, Kamarang 

 River, January 25, 1886 — Salvin-Godman collection. 



Breeding-season. Unknown in British Guiana. 



Kest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Mount Roraima (^McConnell collec- 

 tion) ; Mount Roraima, Mount Twek-quey, Kamarang River 

 {Whitely). 



Extralimital Range. Venezuela, Colombia, Ecuador, Peru, 

 Bolivia. 



Habits. Unrecorded in British Guiana. 



