615 



COLYMBUS ARCTICUS. 



(BLACK-THROATED DIVER.) 



Mergus gutture nigro, Briss. Oru. vi. p. 115 (1760). 



Colymbus arcticus, Linn. Syst. Nat. i. p. 221 (1766). 



Colymbus ignotus, Bechst. Gemeinn. Naturg. Deutschl. ii. p. 782 (1791). 



Colymbus leucopus, Bechst. Vog. Deutschl. iv. p. 625 (1809). 



Cepplms arcticus (L.), Pall. Zoogr. Rosso-As. ii. p. 81 (1811). 



Eudytes arcticus (L.), Illiger, Prodr. p. 282 (1811). 



Colymbus macrorhynclios, C. L. Brehm, Vog. Deutschl. p. 974 (1831). 



Colymbus balticus, Hornsch. & Schill. Verz. Vog. Pomm. p. 21 (1837). 



Colymbus megarhynchos, C. L. Brehm, Vogelfang, p. 405 (1855). 



Colymbus balthicus, H. & S., C. L. Brehm, Vogelfang, p. 405 (1855). 



Colymbus pacificus, Lawr. B. N. Am. p. 889 (1858). 



Plongeon a gorge noire, French ; Polartaucher, Polarlumme, German ; Parelduiker, Dutch ; 

 Polar-Lorn, Danish ; Loumur, Fseroese ; Stor lorn, Sortstrubet lorn, Norwegian ; Stor lorn, 

 Swedish ; Kuikka, Finnish ; Gagara polosataya, Russian. 



Figurce notabiles. 



Edwards, Nat. Hist. B. pi. 146; D'Aubenton, PL Enl. 914; Werner, Atlas, Palmipedes, 

 pi. 68 ; Kjgerb. Orn. Dan. taf. 51 B ; Naumann, Vog. Deutschl. taf. 328 ; Sundevall, Svensk. 

 Fogl. pi. 53. figs. 2, 3 ; Gould, B. of Eur. pi. 394; id. B. of G. Brit. v. pi. 44 ; Schlegel, 

 Vog. Nederl. pi. 267; Audub. B. of Am. pi. 477. 



<3 ad. ptil. cest. pileo, nucha et collo postico cinereis, fronte saturatiore, capitis lateribus vix brunneo tinctis : 

 mento et gutture intense nigris violaceo tinctis : gutturis lateribus nigro et albo striatis, gutture imo 

 magis striate, gula albo striata : corpore supra nigro, utrinque albo fasciato, his fasciis plagas duas 

 formantibus : rectricibus et remigibus nigris : tectricibus alarum superioribus nigris albo guttatis : 

 corpore subtus albo, hypochondriis nigris : rostro nigro, ad basin plumbeo : iride fusca : pedibus extus 

 nigro-fuscis vix viridi tinctis, intiis rufescenti-albidis. 



Juv. pileo, nucha et collo postico sordide cinereis : gula, et gutture albis nee nigris : corpore supra nigro-fusco, 

 plumis pallidiore marginatis : rostro et pedibus pallidioribus. 



Adult Male in summer (Archangel). Crown, nape, and hind neck ashy grey, darker on the forehead, and 

 slightly tinged with brown on the sides of the head ; chin and entire throat velvety black with a purple 

 or violet tinge ; on the upper throat is a patch of white stripes crossing the black ; sides of the throat, 

 bordering the black, striped black and -white, these stripes increasing in number on the lower throat, 

 where the black patch ends, and where they nearly meet in front ; upper parts deep glossy black, marked 

 on each side with two large rows or patches of white cross bars ; upper surface of the wings black, 



