ALLIED TEBN, 57 



the most lateral quill on each, side of a velvety ash; beak yellow, 

 and, according to Irby, slightly angulated or "Gull billed;" feet 

 black. — (Degland.) 



Male and fenaale in winter. — Forehead and half of vertex anteriorly 

 white; the other half and the occiput black, varied with white; a 

 crescent-shaped patch of black in front of the eyes; the yellow of 

 the beak less lively. The interior border of the sixth, seventh, and 

 eighth primaries white, and very regularly defined. 



My figure is from a specimen sent to me by Mr. Tristram, and is 

 in the transition state between the two plumages. Like all other 

 birds figured from Mr. Tristram's collection, no notice being given 

 to the contrary, this specimen was shot by Mr. T. himself. 



It has also been figured by Buffon, pi. enl. 987, in summer plumage; 

 Bouteille, Ornith. du Daup., pi. 60, fig. 1; E,iippell, Atlas, pi. 14; 

 Gould, B. of E., pi. 417. 



The e^^ is (by permission of the editor) from Baron Warthausen's 

 plate in the "Ibis," vol. ii, p. 127. 



VOL. V. 



