24 BIRDS OF BRITISH GUIANA. 



remains o£ rusty-brown on the wings and under tail-coverts and 

 the throat grey instead o£ black. 



Adult female. Upper surface rufous-brown ; inner webs of 

 flight-quills dark brown edged with cinnamon-buff ; throat whitish 

 tinged with bufF; breast pale rufous-brown, becoming bright 

 rufous on the lower abdomen, under tail-coverts, and under wing- 

 coverts. Wing 70 mm. 



The female described was collected on the Kamakabra River. 



Breeding-season. Unknown in British Guiana. 



Nest. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Ituribisi River, Supenaam River, 

 Partica, Kamakabra River, Bonasika River, Great Falls Demerara 

 River, Arwye Creek (IfcConneZZ collection); Bartica, Kamakusa, 

 Merum6 Mountains, Mount Roraima, Takutu River (^Whitely) ; 

 Marakka ( W. L. Sclater). 



Extralimital Range. Cayenne (^British Museum), Venezuela, 

 Central Brazil. 



Habits. Unrecorded in British Guiana. 



Genus THAMNOMANES Cab. 



Tliamnmnanes Cabanis, Archiv fiir Naturg. xiii. pt. i. p. 230, 1847. 

 Type T. cwsius (Licht.). 



Fig. 12. — Thamnomanes cassius. 



Head not created, but a concealed white dorsal patch is present. 

 Bill sharply hooked, somewhat broad at the base, and profusely 

 furnished with rictal bristles; the exposed culm en is about 16 mm. 

 and about equal to the tarsus in length. Wing rounded, the 

 fourth, fifth, and sixth primaries longest, the third shorter than 

 the sixth and longer than the seventh. In the type of the genus 



