3. ALLE. 



571 



Adult in breedinrj-plwtiaije. Top of the head and upper parts 

 black with a greyish gloss ; rest of the head, ueck, and chest sooty- 

 black ; secondaries tipped atid scapulars margined on the sides with 

 white ; breast and rest of the underparts white, the inner webs of 

 the inner flank-feathers dull black; quills and tail greyish black; 

 the latter composed of 12 feathers. Iris hazel ; bill black ; feet 

 and toes livid brown ; toes darker. 



Total length about 8'5 inches, culmcn from feathers on forehead 

 to tip 0-6-0*65, from gape to tip 0*9, greatest depth of both man- 

 dibles at base 0-4, wing •i-6-4-7, tail 1-3-1-5, metatarsus 0-85-0-9, 

 middle toe and claw l"2-l-3. 



Adidt in non-breeding 'plimiacie. Differs from the above in having 

 the throat, lower part of tlie cheeks, sides of the nape, fore-neck, 

 and chest white like the rest of the underparts, the latter being 

 however distinctly mottled with dusky, especially oa the sides. 



A quite younj bird in summer (Aug. 9). Perfectly similar to the 

 adult in breeding-plumage, but about half the size ; the upper parts 

 devoid of gloss, and the bill much slighter. The wing, with the 

 quills only partially grown, measures 3'4 inches. 



Immature {in first 2vintej- plumage). May be distinguished from 

 the adult by its smaller bill and by the lack of gloss on the upper 

 part. 



Young in down. Uniform dark smoky-grej', somewhat paler on 

 the underparts. 



Hab. The same as that of the genus. 



a-c. Ad. sk. 



d. Ad. sk. 



e. Ad. sk. 



/. Ad. sk. 



ff. Ad. sk. 



h'k. $ ad. sk. 



I. Ad. sk. 



m, n. Ad. sk. 

 0. Ad. sk. 



2}. c? ad. sk. 



q. Ad. sk. 

 r. 2 ^<1- sk. 

 s. 2 ad. sk. 



t. cJ ad. sk. 



M. S ad. sk. 

 V. Ad. sk. 



North America (Parri/). 

 Godbout, Quebec, Canada, Jan. 



(N. A. Comeau). 

 Grand Mauan I., New Bruns- 

 wick, Feb. (//. Herrick). 

 Grand Manan I., winter {H. E. 



Dresser). 

 Bay of Fiuidy, winter (G. A. 



Boardman). 

 Boston, Massachusetts, Nov. 15 



{H. W. Henshaw). 

 Cape Walker, Baffin's Bay, 



July 26 (R.McC). 

 Greenland, winter. 

 Greenland, summer {Gov. 



Feticker). 

 Lichtenfels, S. Greenland, Nov. 



Faroes, winter {H. C. Midler). 

 Thorshavn, Faroes, winter. 

 Moray Firth, Dec. 10. 



Fosdyke, near Spalding, Lin- 

 colnshire, Feb. 2. 



Devonshire, winter. 



Off Spitsbergen, lat. 79° 30' 

 N^ long. 4° E., summer. 



The Admiralty [P.]. 

 Salvin-Godman Coll. 



Salvin-Godman Coll. 



Salvin-Godman Coll. 



Salvin-Godman CoU. 



Salvin-Godman Coll. 



McCormick Bequest. 



Hume Coll. 

 Salvin-Godman Coll. 



Dr. R. Bowdler 



Sharpe [P.]. 

 Hargitt Coll. 

 Seebohm Coll. 

 J. M. Chad wick, Esq. 



[P.1. 

 T. J. H. Brogden, 



Esq. [P.]. 

 Montagu Coll. 

 Capt. D. Gray [P.]. 



