234 AYES : ANSERES. XXXV. 



known by the bill. L. 22. W. 11. T. 4. Northern regions; 

 S. to N. J. (Eu.) (Lat., conspicuous.) 



362. OIDEMIA Fleming. (018^0, swelling.) 



a. Bill in ^f scarcely encroached upon by frontal feathers; nostrils median; 

 no white on wings. (Oidemia.) 



712. O. americana Swainson. AMERICAN BLACK SCOTER. 

 $ entirely black; 9 s oty brown, paler below and on throat. 

 L. 17 to 20. W. 10. T. 4. N. Am., coastwise; S. to N. J. 



aa. Bill in cf broadly encroached upon by frontal feathers ; nostrils beyond 

 middle of bill ; a large white wing patch. (Melanitta Boie.) 



713. O. deglandi Bonaparte. WHITE WINGED SCOTER. SURF 

 DUCK. black ; white spot under eye and white on wings ; bill 

 orange-tipped; feet orange; 9 sooty brown. L. 21. W. 11. N. 

 Am., S. to Md. 



aaa. Bill in rf narrowly encroached upon by frontal feathers; no white on 

 'wings; nostrils beyond middle of bill. (Pelionetta Kaup.) 



714. O. perspicillata (L.). SURF DUCK. SEA COOT. $ black, 

 with white spot on forehead and nape ; 9 sooty brown ; white patch 

 on lore? and cheeks ; size of 0. americana. N. Am., coastwise. 

 (Lat., conspicuous.) 



363. ERISMATURA Bonaparte (epeioyza, prop ; ovpa, tail.) 



715. E. jamaicensis Gmelin. RUDDY DUCK. Chiefly brownish 

 or tawny, glossy chestnut in full plumage; considerably waved and 

 dotted, lower parts mottled silver-white ; crissum white ; 9 brown, 

 mottled with dusky. L. 17. W. 6. T. 3^. N. Am., frequent ; an 

 expert diver. 



364. NOMONYX Ridgway. (yo^os, regularity ; ow|, nail.) 



716. N. dominicus (L.). Redder than the last; forehead and 

 chin black. L. 13. W. 6J. Trop. Amer., straying N. to Wis., 

 etc. (From San Domingo.) 



365. CHEN Boie. (^i/, goose.) 



717. C. coerulescens (L.). BLUE GOOSE. Grayish brown, the 

 rump and wing coverts gray ; size and form of next. N". Am., rare. 

 (Lat., bluish.) 



718. C. hyperborea (Pallas.) SNOW GOOSE. Adult pure 

 white, washed with reddish on head ; the primaries black ; young 

 bluish ; feet reddish, the claws dark ; bill red ; lamellaa very promi- 

 nent. L. 30 to 38. W. 17. T. 6. B. 2. N". Am., chiefly W. 

 The form E. of the Rocky Mts. is var. nivalis Forster ; larger than 

 the Western bird. (Lat., far-northern.) 



366. ANSER Brisson. (Lat., goose.) 



719. A. albifrons Gmelin. WHITE-FRONTED GOOSE. SPECKLE- 

 BILL. Grayish-brown, mottled, forehead and tail coverts white ; 



