142 BIRDS OF BRITISH GUIANA. 



440, Colonia leuconotus. 



Northern Loxg-tailed Tyrant. 



(Plate III. fig. 1.) 



Copiii'vs leuconotus Lafr. Rev. Zool. 1<S42, p. 23.j (Bogota) ; Salvin, 

 Ibis, 1885, p. 291; Sclater, Cat. B. Brit. Mus. xiv. p. 51, 1888; 

 Braboume & Cluibb, B. S.«Amer. i. p. 267, no. 2715, 1912. 



Copurus poecilonotus Cab. in Schomb. Eeis. Guian. iii. p. 703, 1848. 



Adult male. General colour both above and below black ; crown 

 of head and nape pale slate-grey with dark centres to some of the 

 feathers on the crown ; base of forehead, a line over the eye, 

 middle of back, and upper tail-coverts greyish-white. "Bill and 

 feet black" (Cat. B. Brit. Mus.) 



Total length 270 mm., exposed culmen 8, width at base {>, 

 wing 86^ tail 56, middle feathers 196, tarsus 14. 



The male described was collected on the Mazaruni River in 

 October 1907. 



Adult female. Similar to adult male but differs in having the 

 middle tail-feathers much shorter and the abdomen dark slate- 

 grey. 



Total length of middle tail-feathers 130 mm., wing 77. 



Breeding-season. Unknown in British Guiana. 



Nest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Mazaruni River, Bartica, Arawai 

 River [McConnell collection)', Canuku Mountains (Schomburffk). 



Extralimital Range. Surinam {Renard), Colombia, West 

 Ecuador. 



Habits. According to Schomburgk (Reis. Guian. iv. p. 703) 

 this bird is somewhat rare in British Guiana, as he states that he 

 only met with single individuals which frequented the trees on 

 the outskirts of the woods in the Canuku Mountains. He was of 

 opinion, too, that it migrated during the rainy season. Of its 

 nidification^ he knew nothing. 



