874 FRATERCULACOLYMBUS 



ad. (Kuriles). Differs from F. arctica in having the sides of the 

 head white, a narrow grey stripe behind the eye, the forehead and crown 

 blackish grey, the black collar on the neck extended up to the chin ; a 

 blackish elongated horn on the upper eyelid ; tip of bill to between the 

 2nd and 3rd groove red, basal part pale chrome-yellow ; swollen angle of 

 gape and inside of mouth orange ; legs orange-red ; iris brownish grey ; 

 naked ring round the eye deep orange. Gape 1'5, heignt of bill at base 

 1'8, wing 7 '3, tail 2'6, tarsus 1'2. Sexes alike. In winter the sides of the 

 head are ashy grey, and the superciliary horns and basal shields on the bill 

 fall off. 



Nab. North Pacific, north to 71 in the Arctic Ocean; Kam- 

 chatka, the Commander and Kurile Islands, the Sea of Ochotsk, 

 Alaska, and British Columbia. 



In habits and nidification it does not differ from F. arctica, and 

 its eggs are ^indistinguishable from those of that species. In both 

 Lunda and Fratercula the young birds resemble the adult in 

 winter dress, but have a smaller bill, and the young in down are 

 dark sooty brown with white or whitish bellies. 



COLYMBUS, Linn., 1766. 



1209. RED-THROATED DIVER. 



COLYMBUS SEPTENTRIONALIS. 



Colymbus septentrionalis, Linn. Syst. Nat. i. p. 220 (1766) ; Naum. xii. 

 p. 434, Taf. 329 ; Hewitson, ii. p. 453, pi. cxxiii. fig. 1 ; Gould, B. 

 of E. v. pi. 395 ; id. B. of Gt. Brit. v. pi. 45 ; Dresser, viii. p. 621, 

 pi. 628 ; David and Oust. Ois. Chine, p. 512 ; Ogilvie Grant, Cat. 

 B. Br. Hue. xxvi. p. 487 ; Saunders, p. 715 ; Lilford, vi. p. 105,. 

 pi. 47 ; C. lumme, Briinn. Orn. Bor. p. 39 (1764) ; Tacz. F. 0. Sib. 

 0. p. 1264 ; Ridgway, p. 8. 



Plongeon cat-mar in, French ; Mergulhao, Portug. ; Cardellot 

 Span. ; Strolaga minore, Ital. ; Nordsee-taucher, German ; Rood- 

 halzige Zeeduiker, Dutch ; L6mr, Icel. ; Nordisk Lorn, Dan. ; 

 Smaalom, Norweg. ; Smdlom, Swed. ; Gakkur, Lapp. ; Kaakkuri, 

 Finn. ; Abi, Jap. 



$ ad. (Greenland). Fore-crown, deep blue-grey streaked with black j 

 hind crown, neck, and fore back black with white margins ; upper parts 

 brownish black, finely spotted with white ; wings and tail blackish brown 

 the latter tipped with dirty white ; sides of head, neck, and throat clear 

 blue-grey ; on the throat a large triangular patch of rusty red ; flanks 

 blackish brown ; rest of under parts white ; bill black ; legs blackish 



