168 BIEDS OF BRITISH GUIANA. 



Key to the Species. 



A. Smaller, wing less than 50 mm. ; upper 



surface paler S. caudata, p. 168. 



B. Larger, wing more than 50 mm. ; upper 



surface darker S. lielenm, p. 169. 



460. Serpophaga caudata. 

 Orinoco Tyrant. 



Onpsiempis caudata Salvin, Bull. Brit. Orn. Club, vii. p. xvi, 1897 



(Ourumee, British Guiana). 

 Serpophaga caudata Brabourne & Chubb, B. S. Amer. i. p. 282, no. 2877, 



1912/ 



Adult female. ■Crown of head, back, scapulars, and lesser upper 

 ■wing-coverts ochreous-brown ; median and greater series hair- 

 bi'own broadly tipped with buffy-white which form two wing-bars; 

 bastard-wing, primary-coverts, and qnills also hair-brown, wii.h 

 pale margins to the last which are wider on the inner webs ; tail 

 dark brown paler at the tip, outer web of the outermost feather 

 on each side white ; a whitish loral streak, with dark tips to the 

 feathers, from the nostrils to above the eye ; sides of the face 

 paler than the crown ; chin, ^ throat, and fore-neck pale buff ; 

 breast, abdomen, thighs, and under tail-coverts lemon-yellow, 

 darker and more or less grey on the sides of the body ; under 

 wing-coverts and axillaries sulphur-yellow ; under surface of 

 flight-quills hair-brown with whitish inner margin ; lower aspect 

 of tail dark brown with whitish shafts and tips and outer webs of 

 the outermost feather on each side. 



Total length 103 mm., exposed culmen 9, wing 47, tail 46, 

 tarsus 11. 



The above description is taken from the type in the British 

 Museum which was in the act of moulting its flight-quills and 

 tail-feathers. 



Breeding-season. Unknown in British Guiana. 



Nest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Bartica (McConnell collection) ; 

 Ourumee {Whitely). 



Extralimital Range. Venezuela, Colombia. 



Habits. Unrecorded in British Guiana. 



