172 



PATAGONIAN EXPEDITIONS! ZOOLOGY. 



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

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

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

 (1900). 



FIG. 105. 



FIG. 106. 



Diomtdea melanophrys. Profile of head. 

 From material in the British Museum. % 

 natural size. 



Diomedea melanophrys. Head from above. 

 From material in the British Museum, *< 

 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 

 merging 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. 



