66 



LAMELLIROSTRAL SWIMMERS — ANSERES. 



and in other characters, but is altogether peculiar in many respects. The turning inward of the 

 edges of the maxilla, so as partly to cover the mandible, in the enclosed bill, is not found in any 

 other genus. The falcate tertials and the general style of coloration aj^proximate it to the Eiders 

 — which, however, are very difi'erent in the form of the bill, and in other respects. 



Eniconetta Stelleri. 



STELLER'S DUCK. 



Anas StcUcri, Pall. Spic. Zoo]. VI. 1765, 35, pi. 5. 



Fuligula (Macropus) Stelleri, Kutt. Man. II. 1834, 451. 



FiUigula (Pulysticta) Stelleri, Brandt, Mem. Acad. St. Petersb. VI. 1849, 7. 



Pohjsticta Stelleri, Eyton, Cat. Br. Mus. 58; Mou. Anat. 1838, 150. — 15aird, B. N. Am. 1858, 



801 ; Cat. N. Am. B. 1859, 598. 

 Somateria Stelleri, Jard. Brit. B. IV. 1839, 73. — CoUES, Key, 1872, 291 ; Check List, 1873, no. 



511 ; 2d ed. 1882, no. 731 ; B. N. W. 1874, 580. 

 Anas dispar, Si'ART.m. Mus. Carls. 1786, pis. 7, 8. 

 Stcllaria dispar, Bonap. Comp. List, 1838, 57. 

 Anas occidua, Bonn. Tabl. Orn. I. 1790, 130. — Shaw, Nat. Misc. pi. 34. 



Hab. Arctic and Subarctic coasts of the Northern Hemisphere. 



Sp. Char. Adult vude : Greater part of the head, and upper portion of the neck, satiny white ; 

 lores, and crescentic tuft across occiput, dark dull greenish ; space surrounding the eye (widest 

 l)ehind), chin, throat (narrowing greatly below), lower part of the neck (all round), middle of the 

 back (longitudinally), scapulars, tertials, and secondaries glossy blue-black or dark steel-blue ; 



rump, i;pper tail-coverts, and tail duller blue-black ; 

 scapulars marked with a mesial lanceolate stripe of 

 satiny white, widest on the inner webs ; tertials with 

 their inner webs wholly satiny white, this invading the 

 inner portion of the outer webs ; secondaries tipped 

 with white. All the wing-coverts, anterior scapu- 

 lars, and sides of the back pure white ; primaries dull 

 bLick. Lower parts dull ferruginous, becoming grad- 

 ually dusky on the middle of the abdomen, foding into 

 buff on the sides, flanks, and jugulum, the buff chan- 

 ging insensibly to white next to the blue-black of the 

 neck and on the upper border of the flanks ; the dusky 

 of the abdomen gradually darkening posteriorly, the 

 whole anal region and crissum being dull black. A 

 small spot of blue-black on the anterior part of the 

 sides, beneath the bend of the wing ; lining of the 

 wing entirely white. " Bill dull graj'ish blue, as 

 are the feet, the claws yellowish gray" (Audubon), 

 Adult female, in summer : Above, dusky, more or less 

 relieved by pale fulvous or light-brown edgings to 

 the feathers, the anterior portion of the back more 

 spotted, but the rump sometimes uniform blackish, 

 though the feathers are usually narrowly tipped with 

 light brownish ; head and neck pale-brown, freckled 

 or transversely speckled with dusky, this forming 

 more distinct bars on the pileum ; jugulum and breast 

 light rusty broAvn, spotted or irregularly barred with 

 dusky ; feathers of sides and flanks dusky, bordered with light brown ; abdomen, anal region, 

 and crissum nearly plain sooty blackish. Wing-coverts dusky, broadly tipped with brownish gray ; 

 speculum dull metallic blue or violet, bounded on each side by a white bar, as in the male ; falcate 



Male. 



