46 BIRDS OF BRITISH GUIANA. 



Adult female. General colour above very dark ochreous-l)ro-\vn, 

 becoming paler brown on the head and outer aspect of the wings ; 

 primary and secondary quills dark brown, with pale edges to the 

 inner webs ; tail-feathers olive-brown regularly, but obscurely, 

 barred with black and fringed with white at the tips ; entire 

 under surface rust-brown. Wing G3 mm. 



The female described was collected at the Great Falls Demerara 

 liiver in August 1913. 



Breeding-season, Unknown in British Guiana. 



JS^est. Unrecorded in British Guiana. 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Supenaam River, Bartica, Great Falls 

 Demerara River (^McConneli collection)', Bartica, Kamakusa 

 ( W lately). 



Extraliinital Range. ? Surinam, Venezuela. 



Habits. Unrecorded in British Guiana. 



378. Cercomacra tyrannina saturatior. 

 Guiana Ant-Wren. 



Cercomacra tyrannina (nee Scl.) Salvin, IVjis, 188o, p. 427 (Bartica 



Grove, Camacusa, Koraima, 3500 ft.); Sclater, Cat. B. Brit. Mus. 



XV. p. 265, 1890 ( Takutu Kiver) ; Brdbourne & Chubb, B. S. Amer. 



i. p. 204, no. 2053, 1912. 

 Cercomacra tyrannina saturatior Chubb, Bull. Brit. Orn. Club, xxxviii. 



p. 85, 1918. 



Adult male. Differs from the type of C. t. tyrannina from 

 Bogota in being much darker, almost black above, and very dark 

 slate-colour on the under surface. 



Total length 144 mm., exposed culmen 17, wing 65, tail 59, 

 tarsus 23. 



Adult female. Dififers from the typical female of C. t. tyrannina 

 in beinor bright chestnut rufous on the cheeks and entire under 

 surface. 



Total length 129 mm., exposed culmen 16,' wing 64. tail 56, 

 tarsus 22. 



The male described was collected on the Ituribisi River in 

 February 1907 and the female in 1909. The types are in the 

 McConnell collection. 



An immature male from the Abary River is, for the most part, 



