500 



THE DIVING BIRDS — PYGOPODES. 



Lining of the wing deep smoky gray. Pull uniform black, the extreme tip a little paler ; iris dark 

 brown ; legs and feet i)ale colored iu the dried skin (fle^h-color in life ^), the webs and claws dusky. 

 Midsummer plnmage: Similar to the above, but more uniformly dusky, the rusty bars of the rump, 

 etc., wanthig, owing to abrasion of the tips of the feathers. Winter plum^uge (= B. JFrangeli, 



Summer plumage. 



Brandt) : Above, dusky, interrupted l^y a narrow white band across the upper part of the nape ; 

 interscapulars, feathers of the runq), and upjicr tail-coverts tipped with plumbeous ; scapulars 

 chiefly white, especially the inner ones, forming a conspicuous longitudinal patch on each side of 

 the back. Entire hjwer parts, including the lower half of the lores and the whole side of the head, 

 except the orbital region, pure white, the exterior feathers of the sides and Hanks striped with 



Winter plumage. 



plumbeous or dusky grayish. Lining of the wing smoky gray, as in the summer plumage. Yoiing, 

 first plumage : Above, uniform blackish (without plumbeous tips to any of the feathers), the 

 occipital Ijand of the winter plumage sliglitly indicated or interrupted ; scapular patch less distinct 

 than in the winter plumage. Lores almost wholly dusky. Lower parts white nearly everywhere, 

 but more especially on the jugulum, breast, and sides, transversely mottled with fuliginous-dusky. 

 Bill much smaller and weaker than in the adult. 



Total length, abuut 9.50 to 10.00 inches ; extent, 18.00 ; wing, 5.00 ; culmen, .60-70 ; tarsus, 

 .70 ; middle toe, without claw, .90-1.00. 



This also is an oceanic and a Pacific species, occurring from the coast of California 

 northward. To what extent this bird is to be found on the opposite coasts of Asia, 



^ According to Audubon (1. e.) the feet are 3^ellow. 



