SITAGRA 393 



The Alien Weaver is a native of the Ruwenzori 

 Mountains. 



The species was discovered in the Ruwenzori Mountains, 

 where four specimens were collected in February, 1902, 

 comprising, what I looli upon as adults of both sexes, and an 

 immature female with a few of the black feathers showing on 

 the head and chin and a trace of an approaching chestnut 

 throat. The adults are all marked "male," but ibey were not 

 sexed by Mr. F. J. Jackson, and I feel confident that one of 

 them is in the full breeding female plumage, for these speci- 

 mens show that, like the other members of this genus, the 

 adult males only have the black throat, and in the structure as 

 well as in the peculiar uniform olive colouring of the back, 

 wings and tail, the present species closely resembles H. 

 OGularius. 



Genus XVII. SITAGRA. 



Most nearly allied to Hyphantornis in both structure and colouring, 

 especially evident on comparing the type, S. luteola, with Hyphantornis 

 intermedins ; but the bill is always more slender. 



Type. 



Sitagra, Eeichenb. Av. Syst. pi. 79 (1850) S. luteola. 



Icteropsis, Pelz. Verb. z,-b. Ges. Wien. xxxi. p. 149 (1881) S. pelzelni. 



The genus is confined to Tropical and South Africa and comprises four 

 species, which are very similar in their habits to Hyphanturgus. 



KEY TO THE SPECIES. 



a. Bill long ; only the hinder third of crown yellow. 



a^. Larger; wing 2-7 siibpcrsonata. 



b^. Smaller; wing 2-4 pelzelni. J; 



b. Bill shorter ; quite half of hinder crown yellow ; wing 



2-25. 

 c^. Bill more slender ; plumage brighter and ilarker . . . personata. 

 d'-. Bill stouter ; plumage paler luteola. ■'■■; 



