DENDROCINCLA. — SITTASOMUS. 117 



Scliter, Cat. B. Brit. Mus. xv. p. 168, 1890 (Bartica Grove); 

 Brabourne & Chubb, B. S. Amer. i. p. 219, no. 2527, 1912. 



Adult. Head, back, sides of face, sides of neck, breast, abdomen, 

 and sides of the body dark sooty-brown ; throat white tinged with 

 lemon-yellow ; upper and under tail-coverts dark chestnut; wings 

 and tail chestnut-brown, apical portion of outer primary-quills 

 dark biowu on the inner webs, the remainder of the primary and 

 the whole of the secondary quills rufous on the inner webs 

 becoming paler on the edges ; under wing-coverts and axillaries 

 pale chestnut ; quills below pale rufous, becoming dark browu at 

 the tips of the outer primaries ; under surface of tail the same as • 

 that of the upper side. 



Total length 162 mm., exposed culmen 20, wing 95, tail Gl, 

 tarsus 21. 



The bird described was collected on the Supenaam River in 

 1910. 



Breeding-season. Unknown in British Guiana. 



2sest. Unrecorded in British Guiana. 



E<j<is. Undescribed from British Guiana. 



Uaiige in British Guiana. Supenaam River (McConnell collec- 

 tion) ; Bartica ( Whit eh/). 



EMvalimital Ranf/e. Surinam (Pe>uird), Cayenne (Licht.), 

 Venezuela, Peru, Brazil. 



JJuhits. Unrecorded in British Guiana. 



Genus SITTASOMUS Swains. 



SittasoiJius Swains. Zool. Journ. iii. p. 355, 1827. Type ^S*. sylviellus 

 (Temm.). 



The species on which this genus was founded are small birds. 

 The bill is slender and pointed at the tip, the exposed culmen is 

 about equal in length to that of the inner toe and claw. The 

 wing is rounded, the third, fourth, and fifth primaries longest, the 

 second rather shorter than the fifth but much longer than 

 the sixth, and the first about e(|ual in length to the outer 

 secondaries. The tail is rounded and graduated, and about the 

 same leno;th as that of the wing. Coloration : male and female 

 similar. 



