172 



PATAGONIAN EXPEDITIONS: ZOOLOGY. 



163 (1901) ; Sharpe, Rep. Coll. Nat. Hist. "Southern Cross," Aves, 

 p. 161 (1902); Nicoll, Ibis, 1901, p. 52 (Valparaiso). 

 Thalassarche melanopJirys, Carbajal, La Patagonia, Part II. p. 277. 

 (1900). 



Fig. 105. Fig. 106. 



Diomedea melanophrys. Profile of head. 

 From material in the British Museum. ^ 

 natural size. 



Diomedea melanoflirys. Head from above. 

 From material in the British Museum, y^ 

 natural size. 



General description. 



Size. Adult Male. — Total length, about 30 inches. 



Wing, 20 inches. 



Tail, 7.3 inches. 



Bill (from gape), 5.2 inches. 



Tarsus, 3.3 inches. 



Color. Adult Male. — General color above, head and neck white, back 

 and wings plumbeous black, tail slaty ; below white. 



Head : White, with a slaty black transocular band. 



Neck white. 



Back : Plumbeous black, becoming more cinereous anteriorly, and 

 rnerging gradually into the white of the neck. 



Wings : Like the back in color. 



Tail : Slaty black, each feather having a white shaft. 



Lower parts : White, except the border of the under surface of the wing 

 which is greyish black. 



Bill : Yellowish horn color, the tip dusky. 



