MECOCERCULUS. — OCHTHORNIS. 135 



a line ahove the eye which encircles the latter greyish-white as 

 is also the chin ; breast hoarj^-grey becoming paler and inclining 

 to yellowish on the lower breast and sides of the body; abdomen, 

 under tail-coverts, axillaries, and under wing-coverts sulphur- 

 yellow : under surface of quills brown with whitish edges to the 

 inner webs ; lower aspect of tail pale brown. 



Total length 117 mm., exposed culmen 9, width at base 7 

 wing 61, tail 52, tarsus 20. 



The bird from which the description is taken was collected at 

 Bartica, 1911. 



Breeding-season. Unknown in British Guiana. 



Nest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Supenaam River, Bartica, Bonasika 

 River {McConnell collection^; Mount Roraima [Wkitely). 



Extralimital Range. Surinam [Penard]^ Venezuela, Colombia, 

 Eucador. 



Genus OCHTHORNIS Sclater. 



OchtJiornis Sclater, Cat. B. Brit. Mus. xiv. p. 31, 1888. T^ie 

 O. Uttomlis (Pelz. ). 



Fig. 55. — OchtJiornis littoralis. 



The species on which this genus was founded has a muscicapine 

 bill which is hooked at the tip, the width at the base is about half 

 the length of the exposed culmen. The wing is rounded, the 

 second, third, and fourth primaries longest and equal, the first 

 about equal in length to the seventh. The tail is almost square at 

 the tip and about five-seventh.s tlie length of the wing. The tarsus 

 is about one-third longer than the exposed culmen. Coloration : 

 male and female similar. 



