154 Capt. Blakiston on the Birds of the 



and Mr. Bernard Ross records it at Mackenzie River. Mr. Murray 

 has given Sterna nigra (Linn.) from Hudson's Bay. 



COLYMBUS TORQUATUS. 



Common throughout the interior in the summer season, but 

 most frequently found on lakes. Specimens from Mackenzie 

 River (Bernard Ross & ' Fauna Bor.-Am.') and Hudson's Bay 

 (Murray) . 



CoLYMBUS ARCTICUS, 



The Black-throated Diver is given by Mr. Murray from 

 Hudson's Bay, and also recorded in the ' Fauna Bor.-Am.' from 

 thence ; I have also seen specimens. Mr. Bernard Ross mentions 

 the variety j)acifica as occurring sparingly on Mackenzie River. 

 He also gives Colymbus adamsii, G. R. Gray, which he states 

 occurs in numbers on Great Slave Lake, 



Colymbus septbntrionalis. 



Hudson's Bay ('Fauna Bor.-Am.'). Mackenzie River (Ber- 

 nard Ross). I have also seen specimens from Hudson's Bay. 



PODICEPS GRISEIGENA. 



Red River Settlement (Smithsonian Institution). Mackenzie 

 River ('Fauna Bor.-Am.' & Bernard Ross). 



PODICEPS CRISTATUS. 



Saskatchawan River ('Fauna Bor.-Am.'). 



120. PODICEPS CORNUTUS. 



Specimens from Mackenzie River recorded by Mr. Bernard 

 Ross and in the 'Fauna Bor.-Am.,' from between Hudson's Bay 

 and Lake Winipeg by Mr. Murray, a specimen in the Smith- 

 sonian Institution, collected by Mr. Kennicott on the Red River 

 of the North, and my own ('Ibis,' vol. iv. p. 10) from the Sas- 

 katchawan Plains and Hudson's Bay,: show the Horned Grebe to 

 be widely distributed in the interior. 



PODICEPS AURITXS. 



Mackenzie River (Bernard Ross). 



PODILYMBUS PODICEPS. 



Mackenzie River (Bernard Ross & 'Fauna Bor.-Am.'). 



Uria grylle. 



Mr. Murray records the Black Guillemot, with a slight pecu- 



