AVES DIOMEDEID^. 



175 



Wing, 19.5 inches. 

 Tail, central rectrices, 10.5 inches. 

 Tail, lateral rectrices, 7.0 inches. 

 Bill, 4.5 inches. 

 Tarsus, 3.0 inches. 



Color. Adult Male. — General color dark sooty fuliginous, 

 lighter on the under surface and about the interscapular region. 



a little 

 A white 



Fig. 107. 



Phoebetria ftiliginosa. Profile of head. From 

 material in the British Museum, y^ natural 

 size. 



Fig. 108. 



r ■■■■:\ 



II , \ ' • n 



Plicebetria fuliginosa. Head from above. 

 From material in the British Museum. ]^ 

 natural size. 



ring almost surrounds the eye, broken only in front. Bill black. Feet 

 and legs dull flesh color. Sexes alike in size and color. 



Geogvaphical Range. — Southern Oceans generally. Tierra del Fuego 

 and the Falkland Islands. North in the Pacific Ocean regularly to 20° 

 South Latitude, and casually to the coast of Oregon. 



Dr. Coues and Mr. Salvin have both noticed individuals presumably 

 referable to this species, which are much greyer in tone than the ordinary 

 form. The D. fuliginosa var. cornicoides of Hutton appears to be based 

 on such examples. I am inclined to believe inasmuch as the two phases 

 are generally found together that this is a difference in color correlating 

 with age, but the fact remains to be investigated and proved. The des- 

 scription here given is based on material in the Academy of Natural 



