TAKABA. — THAMNOPHILUS. 11 



black, with white tooth-like marks on the inner webs of the 

 feathers ; tips of upper tail-coverts and tips of tail-feathers also 

 white ; entire under surface, including the under wing-coverts, 

 white, more or less grey on the flanks. 



Total length 200 mm., culmen 25, wing 91, tail 76, tarsus 32. 



Adult female. Differs from the adult male in having the head, 

 back, wings, and tail chestnut-brown. 



Total length 185 mm., culmen 25, wing 88, tail 74, tarsus 32. 



Breeding-season. Unknown in British Guiana. 



Nest. Uni-ecorded in British Gruiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Ituribisi River, Supenaam River, 

 Bartica, Bonasika River, Abary River {McConnell collection) ; 

 Takutu River, Quonga River (^Whitely). 



Extralimital Range. North Brazil (Para, Cahanis), Trinidad, 

 Venezuela. 



Habits. Schomburgk states (Reis. Guian. iii. p. 687) that he 

 often found tliis bird in bushes on the outskirts of woods as well 

 as in dense woojjs in the neighbourhood of rivers. It is a ■\'ery 

 wary bird, and at the slightest sign of danger hides itself in the 

 thickest of bushes. 



Genus THAMNOPHILUS Vieill. 



Thamnophilus Vieillot, Anal. nouv. OrnitL p. 40, 1816. Type T. doliatus 

 (Linn.). 



Fig. 8. — ThamnopTiilus doliatus. 



The chief characters that constitute this genus are the large crest, 

 which is composed of white feathers with black tips. The concealed 

 dorsal white patch. The bill is short and stout, the depth being 

 about one third the length of the exposed culmen. "Wing almost 



