TARABA. — 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 grev 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. 



JS^est. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Ituribisi liiver, Supenaam liiver, 

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

 Takutu River, Quonga River (^Whitely). 



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

 Venezuela. 



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

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

 as in dense woods in the neighbourhood of rivers. It is a very 

 warv bird, and at the slightest sign of dano;er hides itself in the 

 thickest of bushes. 



Genus THAMNOPHILUS Vieill. 



Thamno2)hilus\'iQ\]\oi, Anal. nouv. Ornith. p. 40, 1S16. Type T. doliatus 

 (Linn.). 



Fig. 8. — Thamnophilus doliatus. 



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

 which is conijtosed 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 



