Diver. NATATORES. COLYMBUS. 411 
BLACK-THROATED DIVER. 
Cotymeus arcticus, Linn. 
PLATE LXXVII. 
Colymbus arcticus, Linn. Syst. 1. 221. 4.—Gmel. Syst. 1. 587.—Raii Syn. 
125. 7.—Will. 259. t. 62.—Lath. Ind. Orn. 2. 800. sp. 4.—Shaw’s Zool. 
12. 236.—Filem. Br. Anim. . 133. sp. 212.—Faun. Amer. Boreal. 2. 475. 
No. 233. 
Mergus guttere nigro, Briss. 6. 115. 4. 
Le Lumme ou Petit Plongeon de la Mer du Nord, Buff: Ois. 8. 261. 
Plongeon Lumme, ou a Gorge noir, Temm. Man. d’Ornith. 2. 913.— 
Lesson, Man. d’Orn. 2. 359. 
Der Polar Taucher, Bechst. Naturg. Deut. 4. 600. 
Black-throated Diver, Penn. Br. Zool. 527. No. 251. pl. &5.—Arct. Zool. 
2. 466.—Edward’s Glean. t. 146.—Lath. Syn. 6. 343. 4.—Lewin’s Br. 
Birds, 6. pl. 229.—Mont. Orn. Dict. 1.—Bewick’s Br. Birds, ed. 1826, 
p- t. 181.—Shaw’s Zool. 12. 336., &c. 
Lumme, Rennie’s Mont. Orn. Dict. 310. 
Lesser Imber, Bewick’s Br. Birds. ed. 1826, p. t. 176, the young. 
Provincrat—Northern Doucker, Speckled Loon. 
Tue Black-throated Diver, in all its states of plumage, is Periodical 
of much less frequent occurrence than either the preceding eon 
or the following species, nor does it extend its migration so 
far to the south as they occasionally do, the instances of its 
capture beyond the Scottish boundary being extremely rare. 
It would appear, however, that individuals sometimes remain 
over the summer, and probably even breed, on the lakes of 
the Western and Northern Highlands, as I have seen a pair 
upon Loch Awe towards the end of June, but did not suc- 
ceed in detecting their place of nidification. By some natu- 
ralists the Black and Red-throated Divers have been consi- 
dered as one, species, the former being the male, and the 
latter the female bird; and even Dr Fiemrnc, in his History 
of British Animals, seems to entertain a doubt on the sub- 
ject, stating, in favour of such an opinion, that he once saw 
a bird of each species together (or at least what he imagined 
at a distance to be such), with a young one. The Red- 
throated bird it appears was secured, and proved to be a 
