144 BIRDS. 



white on wing; L. 20; W. 9; T. 8, or less. N. Am. 

 and Europe; chiefly northern and coastwise. 



16. CAMPTOLSEMUS, Gray. PIED DUCKS. 

 1. C. labradorius, (Gm.) Gray. LABRADOR DTJCK. 

 $ chiefly black and white; $ plumbeous; L. 24; W. 9. 

 Coast, chiefly northern; scarce. 



17. HISTRIONICUS, Lesson. HARLEQUIN DUCKS. 

 1. H. torquatus, (L.) Bon. HARLEQUIN DUCK. $ leaden 

 bluish, much varied; speculum violet and purple; $ dark 

 brown, etc. Atlantic Coast, Am. and Europe. 



18. SO MATER I A, Leach. EIDER DUCKS. 



1. S. mollissima, (L.) Leach. EIDER DUCK. $ in 

 breeding dress, white; under parts, rump, quills, and 

 crown patch black; $ reddish brown, streaked; bill with 

 long, club-shaped, frontal processes extending in line 

 with culmen; L. 24; W. 12. Arctic regions; S. to New 

 England in winter. (/S. dresseri, Sharpe.) 



2. S. spectabilis, (L.) Leach. KING EIDER. $ chiefly 

 black; front parts, etc., white; frontal processes broad, 

 squarish, out of line of culmen; slightly smaller. Nor- 

 thern regions; S. to N. Y. 



19. (EDEMIA, Fleming. SURF DUCKS. 



* Bill not encroached upon by frontal feathers ; tail 16-feathered ; 

 no white on wings. (CEdemia.) 



1. (E. americana, Sw. AMERICAN BLACK SCOTER. $ 

 entirely black; ? sooty brown, paler below and on throat; 

 L. 18 to 24; W. 10. N. Am., all coasts. 



** Bill broadly encroached upon by frontal feathers; a large 

 white wing patch. (Melanetta.) 



2. (E. fusca, (L.) Sw. VELVET SCOTER. WHITE 



