234 AVES : ANSERES. — XXXV. 
known by the bill. L. 22. W. 11. T.4. Northern regions; 
S.toN. J. (Eu.) (Lat., conspicuous.) 
362. OIDEMIA Fleming. (oidqya, swelling.) 
a. Bill in g scarcely encroached upon by frontal feathers; nostrils median; 
no white on wings. (Oidemia.) 
712. O. americana Swainson. AMERICAN Buiacxk Scorer. 
& entirely black; 9 sooty brown, paler below and on throat, 
L.17to 20. W.10. T.4. N. Am,, coastwise; S. to N. J. 
aa. Billin ¢ broadly encroached upon by frontal feathers; nostrils beyond 
middle of bill; a large white wing patch. (Jelanitta Boie.) 
713. O. deglandi Bonaparte. Wuire Wi1nGrEp Scotrer. Surr 
Ducx. ¢ black; white spot under eye and white on wings; bill 
orange-tipped ; feet orange; 9 sooty brown. L. 21. W.11. N. 
Am., 8. to Md. 
aaa. Bill in & seen ly encroached upon by frontal feathers; no white on 
wings; uostrils beyond middle of bill. (Pelionetta Kaup.) 
714. O. perspicillata (L.). Surr Duck. SzaCoor. ¢ 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 (épetopa, prop; oidpd, tail.) 
715, EB. jamaicensis Gmelin. Ruppy 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. (vépos, regularity ; dvvé, nail.) 
716. N. dominicus (L.). Redder than the last; forehead and 
chin black. L. 13}. W. 64. Trop. Amer., straying N. to Wis., 
ete. (From San Domingo.) 
365. CHEN Boie. (yj, goose.) 
717. C. coerulescens (L.). Buiuz 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; lamelle very promi- 
nent. L. 30 to 38. W.17. T. 64. 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- 
Bitu. Grayish-brown, mottled, forehead and tail coverts white ; 
