NEMOSIA. HEMITHRAUPIS. 541 



Total length 117 mm., exposed culmen 10, wing 70, tail 43, 

 tarsus 19. 



Adult female. General colour of the upper surface lavender- 

 blue, including the head, back, wings, and tail; under surface for 

 the greater part white tinged with pale fawn-colour on the throat 

 and a wash of blue on the breast, abdomen, and sides of body. 

 Wing 66 mm. 



The specimens described were collected on the Abary River in 

 July and November 1906. 



Breeding-season. Unknown in British Guiana- 



Nest. Unrecorded in British Guiana. 



J^gc/s. Undescribed from British Guiana. 



Range in British Guiana. Upper Takutu Mountains, Ituribisi 

 Tliver, Abary River (McConnell collection). 



Extralimital Range. Surinam [Fenard), Cayenne, Brazil, Vene- 

 zuela, Colombia. 



Habits. Unrecorded in British Guiana. 



Genus HEMITHRAUPIS Cab. 



Jb-emithraupis Cabanis, Mus. Hein. i. p. 21, 1850. Type H. ruficapilla 

 (Vieill.). 



The species included in this genus are also birds of small size. 

 The bill is pointed, its width at the base is equal to about half the 

 length of the exposed culmen and the tip of the upper mandible 

 is slightly hopked. The wing is rounded, the second, third, and 

 fourth primaries longest and equal, the first is intermediate in 

 length between the fourth and fifth. The tail is square at the 

 tip and about five-sevenths the length of the wing. The tarsus 

 exceeds the length of the exposed culmen by about one-third. 

 Coloration : male and female different. 



Key to the Species. 



A. Crown of head and mantle blackish in 



contrast to the back, which is bright 



yellow; throat yellow H. Jiellmayri, d , p. 542. 



a. Crown of head and back smoke-brown jH. hellmayri, $ , p. 542. 



B. Crown of head and mantle bronze-green 



in contrast to the back, which is bright 



fawn-colour; throat black S. roraimm, c?,p. 542. 



h. Crown of head and back yellowish 



olive-green S. roraimm, $ , p. 543. 



