40 LAMELLIROSTRAL SWIMMERS — ANSERES. 



culmen ; tail rather long (about half the wing), of sixteen feathers. Colors, pied white and black 

 in the male, brown and white in the female. 



This genus comes nearest in its characters to Histrioniciis, but is quite distinct. Three species 

 are known, their special characters being as follows : — 



Com. Char. Adult: Head and upper part of the neck black, with metallic reflections, and with 

 a patch of white, varying in form with the species ; lower part of the neck, all round, entire lower 



C. glaucion. 



parts, part of scapulars, wing-coverts, and secondaries white ; other upper parts black. Female : 

 The black replaced by brown, the white absent from the head (except in B. albcola), and more 

 restricted elsewhere. 



A. Size rather large (wing, 7.40 inches or more) ; male with a white spot before the eye ; female 

 without white on the head. 



1. C. islandica. Male : White patch on lores wedge-shaped, the head glossed with bluish vio- 



let ; a broad black bar between the white of the middle and greater wing-coverts. Female : 

 Head dark sepia or purplish snuff-brown ; a distinct black bar across the ends of the 

 greater wing-coverts. Wing, 8.25-9.40 iuches ; length of bill to point of basal angle, 

 1.40-1.80; tarsus, 1.30-1.60; middle toe, 2.15-2.50. Hab. Northern North America, 

 breeding far southward (at least to Colorado) in higher portions of Rocky Mountains; 

 Greenland ; Iceland ; accidental in Europe. 



2. C. glaucion. Male : White patch on lores roundish ; white patch of wings not interrupted 



by a black bar. Female : Head grayish umber-brown ; white wing-patch usually con- 

 tinuous. 

 a. Glaucion.'^ Male adult: Wing, 8.50 inches ; bill from tip to basal angle, 1.70-1.80; tar- 

 sus, 1.30 ; middle toe, 2.20. Hab. Palsearctic Region. 



1 Clangula glaucion, Linn. The Golden-eye. 



Anas clangula, Linn. S. N". ed. 10, I. 1758, 125 ; ed. 12, I. 1766, 201. — Naum. Vog. Deutschl. 



Xn. 1844, 162, pi. 316. 

 Glaucion clangula, Kaup, Naturl. Syst. 53. — Keys. & Blas. Wirb. Eur. 1840, Ixxxvi. 

 Anas glaucion, Linn. S. N. ed. 10, 1. 1758, 126 ; ed. 12, I. 1766, 201. 



Clangula glaucion, Brehm, Vog. Deutschl. 929. — Guay, Gen. B. III. 622 ; Cat. Brit. B. 1863, 202. 

 Anas hycmalis. Pall. Zoog. Rosso. As II. 1826, 270. 

 Clangula chrysoptludmos, Steph. Gen. Zool. XII. pt. ii. 182, pi. 56. — Bonap. Comp. List, 1838, 



58. — Macgill. Man. II. 183. 

 Clangula vulgaris, Flem. Brit. Aniin. 1828, 120. 



Clangula leucomelas and C. pcrcgrina, Breiim, Vog. Deutschl. 1831, 927. 

 Golden-eye, Yakr. Brit. B. ed. 2, 111. 368, fig. ; ed. 3, 111. 371, fig. 



