50, (EDEMIA. 399 



«'. (S iuv. sk. Liskenasset, Greenland Hargitt Coll. 



[Miiller). 



b'~e'. S $ ad. sk. Greenland. Hume Coll. 



/. 2 ad. sk. Labrador. Gould Coll. 



(/'. c? ad. sk. Labrador. Seebohm Coll. 



'h', i'. cJ $ ad. sk. Bay of Fundy, Nov. {H. E. Salvin-Godmau Coll. 



Dresser). 



k'. cJ ad. sk. Hudson's Bay. Hudson Bay Com- 



pany [P.]. 



r. Juv. sk. Chief Mountain Lake, Aug. Dr. E. Coues [C.]. 



m'. 5ad.sk. 49th Parallel. N.America Boundary 



Comm. [P.]. 



«', o'. c? $ ad. sk. Godbout, Canada, April, May Salvin-Godman Coll. 



(N. A. Comeau). 



p' . c? ad. sk. Canada. Govt, of Canada [P.]. 



q' . ? 2 ad. sk. Maine, Feb. {M. Hardy). Sah"in-Godman Coll. 



r', .s'. (5 ad. et cJ Hancock Co., Maine, Jan., Feb. Salvin-Godman Coll. 



juv. sk. (M. Hardy). 



<'." Skeleton. Greenland. M. Miiller [C.]. 



u', v. Sterna. Europe. M. Lefebvre [C.]. 



w'. Trachea with larynx. 



50. (EDEMIA. ^ 



Type. 



Oidemia, Fleming, Phil, of Zool. ii. p. 260 (1822) . . (E. nigi-a. 



Melanitta, Boie, Isis, 1822, p. o64 CE. nigra. 



Ania, Leach in Mus. Brit., Jide Stejjh. Gen. Zool. 



xii. 2, p. 212 (1824). 

 Maceranas (subgen.). Less. Man, d'Orn. ii. p. 414 



(1828) CE. fusca? 



Macrorhamphus (subgen.), Less. op. cit. p. 414 



(1828) (E. perspicillata. 



Pelionetta, Kaiq?, Natiirl. Syst. p. 107 (1829) ... CE. perspicillata. 

 CEdemia, Strickl. Ann. ^- May. N. H. vii. p. .39 



(1841). 

 Melanonetta, Simdev. Meth. nat. Av. disp. Tent. 



p. 149 (1872) (nomen emend. =Melamtta). 



Range. Confined to Northern Hemisphere. 



Cf. Mackay, G. H., " The Scoters {Oidemia americana, 0. deglandi, 

 and 0. perspicillata) in New England " (Auk, viii. pp. 279-290, 

 1891). Trumbull, G., " Our Scoters " (Auk, ix. pp. 153-160, 1892). 

 Mackay, G. H., " The Spring Migration of the Scoters in 1892 " 

 (l. c. pp. 292-294). 



Key to the Species. 



a. Length of commissure much less than inner 



toe without claw; bill of adult male much 



swollen on top at base ; wing without white 



speculum ((Edemlv). 



a'. Nail of bill much flattened, scarcely hooked 



at tip. Adult male : Bill black, with a 



j'ellow or orange spot or band on culmen 



in front of the basal knob, or even extended 



along the middle of it. Adult female : 



