1. COLYMBUS. 489 



(1834) ; Yan-ell, Hist. Brit. B. iii. p. 335 (1843) ; A'war, Zool. 

 {■2) iv. p. 1499 (I860) [habits]. 

 Plotus claiidicau.?, Seep. Annus, i. p. 72 (1769). 

 Mergus iiaivia, Tunstall, Orn. Brit, p. 3 (1771) ; Boiuiat. Tab/. 



Encycl. Meth. i. p. 73 (1790). 

 Le PIono:euu, D'Ai'bent. Bl. Enl. ix. pi. 53 [no. 99l'] ; Buff. Hist. 



Nat. dis. viii. p. 254, pi. xxi. (1781). 

 Le Luimne ou petit Ploiigeon de la mer du Nord, Buff. Hist. Nat. 



Oi'<. viii. p. :2(il (1781). 

 Speckled Uiver, Pennant, Arct. Zool. ii. p. 519 (1785) ; Lath. Gen. 



Si/n. iii. pt. ii. p. 341 (1785) ; id. Gen. Hist. x. p. 91 (1824). 

 Mergii.s stellatus, Bonnat. Tabl. Encycl. Meth. 1. p. 71, pi. 19. fig. 2 



(1790). 

 -Mergus septentrionalis, Bonnat. Tabl. Encycl. Meth. i. p. 72 (1790). 

 Urinator striatus, Lacep. S)- Daudin in Buff. Hist. Nat. (I81110, Didot), 



Quadr. xiv. p. 310, Ois. xvi. p. 174 (1799). 

 Urinator bailloni, Lacep. S,- Daudin in Buff. Hist. Nat. (1 81110, Didot), 



Quadr. xiv. p. 311, Ois. xvi. p. 176 (l'799). 

 Coljmbus iHifogiilaiis, Meyer ^- H'olf, Taschenh. ii, p. 453 (1810). 

 Cepphus septentrionalis, Pallas, Zoogr. Eosso-As. ii. p. 342 (1811). 

 Cepphus stetlatiis, Pallas, Zoorp-. Eosso-As. ii. p. 344 (1811). 

 Boreal Diver, Lath. Gen. Hist. x. p. 94 (1824). 

 Newcastle Diver, Lath. Gen. Hist. x. p. 94 (1824). 

 Eudvtes septentrionalis, Licht. Verz. Doubl. p. 87 (1823) ; Naum. 



Nat. Vd(/. Dt'utscht. xii. p. 434, pi. 329 (1844) ; Alston S; Brown, 



Ibis, 1873, p. 72 [Archangel] ; Brooke, Ibis, 1873, p. 349 [Sardinia] : 



Bau, etc. J.f. O. 1876, p. 341 [Germany]. 

 Colymbus microrhynchus, Brehm, Voyelfang, p. 405 (1855). 

 Colymbiis glacialis, Swinhoe {nee Linn.), Ibis, 1860, p. 67 [Aiuoy : 



winter]. 

 Urinator lumnie, .S7 (;;■«, P. U.S. Nat. Mus. v. p. 43(1882); Baird, 



Brew. S,- Ridi/w. Water-B. N. Amer. ii. p. 457 (1884) ; Stejn. 



Bull. U.S. Nat. Mus. xxix. p. 15 (1885) [Commander Is.], p. 314 



[Kamschatka] ; Turner, Auk, ii. p. 159 (1885) TNearer Is., 



Alaska] ; A. O. U. Checkl. p. 76 (1886) ; Seton, Auk, iii. p. 147 



(1886) [W. Manitoba]; Scott, Auk, iii. p. 383 (18S6) TArizona] ; 



Toivnsend, Auk, iv. p. 12 (1887) [N. Alaslca]; Ilidyw. Man. N. 



Am. B. p. 8 (1887) ; Nelson, Rep. N. H. Alaska, p. 37 (1887) : 



Smith S,- Palmer, Auk, v. p. 147 (1883) [Washington, D.C.] ; 



Butcher, Auk, v. p. 170 (1888) [Long!.]; Scott, Auk, v.^p. S74: 



(1888) [Gulf of Florida]; Chamberl. Auk, xi. p. 213 (1889) [S. 



Greenland] ; Clarke, Auk, vii. p. 320 (1890) [Hudson Bay] : Loomis, 



Auk, viii. p. .55 (1891) (S. Carolina]; MacFarl. P.'^ U.S. Nat. 



Mus. xiv. p. 410 (1891) | Arctic America] ; Hatch, B. Minnesota, 



p. 13 (1892) ; Mcllwraith, B. Ontario, ed. 2, p. 34 (1894). 

 Urinator septentrionalis, »SW/«/oir, J.f. 0. 1895, p. 462 [W. Greenland]. 

 Gavirt luinme, Allen, Auk, xiv. p. 312 (1897) ; Grinnell, Auk, xv. 



p. 124 (1898) [Sitka]. 



Adult in hreedlnej-plamage. General colour above dark ash-brown, 

 with a slight oil-green gloss, many of the feathers often indistinctly 

 spotted with white.* Sides of the head and neck, as well as the 



* The white spots, which are characteristic of the winter )ilumage, become 

 abraded and often entirely disappear in the breeding-phiniago. This was 

 correctly pointed out by Adaruson (• Some more S.raps about Birds,' p. 199). 

 but contradicted by Seebohm, Hist. British Birds, iii. p. 414. Only a few 

 feather.s of the upper back are renewed at the partial spring moult. 



