152 
Capt. Blakiston on the Birds of the 
Stercorarius pomarinus. 
Mackenzie River (Bernard Ross). Hudson’s Bay (‘ Fauna 
Bor.-Am.’). 
Stercorarius parasiticus. 
Mackenzie River (Bernard Ross). 
Yar. richardsonii, Mackenzie River (Bernard Ross & i Fauna 
Bor.-Am.’). I have also received a specimen of Richardson’s 
Skaw, from Hudson’s Bay. 
Stercorarius cepphus. 
I have received from Hudson’s Bay two specimens of Buffon’s 
Skaw, whence Mr. Murray also notes it, and Mr. Ross from 
Mackenzie River. 
Larus glaucus. 
I have seen a specimen among some skins from Hudson’s Bay; 
the wing measured 16^ inches. 
Larus glaucescens. 
Mackenzie River (Bernard Ross). 
115. Larus argentatus. 
Besides my specimen ( f Ibis,’ vol. iv. p. 10), killed at York 
Factory, on Hudson’s Bay, Mr. Murray also records the Herring 
Gull from Severn House, a little further south. Besides these, 
there is a specimen in the Smithsonian Institution from Nelson 
River; and Mr. Bernard Ross records it from the Mackenzie. 
Larus californicus. 
Mackenzie River (Bernard Ross). 
116. Larus delawarensis. 
The Ring-billed Gull, given in the f Fauna Bor.-Am.’ under 
(according to Lawrence, in Baird’s Report) the various names of 
canus , zonorhynchus, and brachyrhynchus , is an inhabitant of the 
Saskatchawan, on the lower part of which river my specimen 
( f Ibis,’ vol. iv. p. 10) was obtained. Mr. Murray also gives 
what he calls a variety of L. zonorhynchus from Hudson’s Bay. 
Mr. Ross, I find, in a list brought up to June 1862, gives a Gull 
under the name of L . brachyrhynchus , and another Larus , name 
unknown, also Blasipus heermanni. 
