234 AYES : ANSEEES. — XXXV. 



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

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



362. OIDEMIA Fleming. (oZSij/ia, swelling.) 

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

 no white on wings. ( Oidemia.) 



712. O. americana Swainson. American Black Scoter. 

 ^ entirely black; 9 sooty brown, paler below and on throat. 

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



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

 middle of bill ; a large white wing patch. (Melanitia 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 <? 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, g black, 

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

 on lores and cheeks ; size of O. americana. N. Am., coastwise. 

 (Lat., conspicuous.) 



363. ERISMATURA Bonaparte (epeia-fia, prop ; ovpd, 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. 1 7. W. 6. T. 3^. N. Am., frequent ; an 

 expert diver. 



364. NOMONYX Ridgway. (vo/ios, regularity ; om^, nail.) 



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

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

 etc. (From San Domingo.) 



365. CHEN Boie. (xrjv, goose.) 



717. C. ccerulescens (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 

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

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

 nent. L. 30 to 38. W. 17. T. 6f 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. albifrona Gmelin. White-pronted Goose. Speckle- 

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



