AVES IBIDID^. 353 



Male, eyes yellow, bill green, legs pinkish with black scales. 



(Sclater & Salvin, on Birds Antarctic America, Voy. H. M. S. ' Chalk' 

 II. Birds, No. ix. p. 436, 1878.) 



Adult female. — Differs from the male in having ashy margins to the 

 feathers of the back, instead of sandy buff. 



There appears to be no difference in the size or proportion of the patch 

 of feathers on the chin in correlation with sex. 



Fig. 179. 



Thcristiais melanopis. Male. 7856, Princeton University Collection. Foot and bare por- 

 tion of leg from front. About y^ natural size. 



Young birds have the entire throat feathered, the cheeks only being 

 naked. The upper surface is greyer and the head, neck, and breast whiter 

 than in adults. The bill is generally shorter. 



Geographical Range. — South America from the Straits of Magellan 

 north to Peru and northern Argentina and the province of Matto Grosso, 

 Brazil. 



The Grey Ibis was taken and observed by the naturalists of the Prince- 

 ton Expeditions throughout Patagonia. Mr. Hatcher has furnished the 

 following notes, which are supplemented by those of other observers. 



"The Ibis was common on the plains, especially so near the coast. 

 Along the cliffs of the seashore I observed it frequently going to roost. It 

 is a singularly noisy and very conspicuous bird." (J. B. Hatcher in MSS.) 



