140 Capt. Blakiston on the Birds of the 
arrives is the middle-sized species, which I believe to beA.albatus; 
next comes the smallest sort, A. rossii ; and lastly the A . hyper- 
boreus, which arrives when the trees are in leaf, and is called the 
Yellow Wavey by the Indians.” Of A. albatus Mr. Ross did not 
procure a specimen; but he feels sure that he has shot it on 
Great Slave Lake, whence he obtained the third species, described 
by Prof. Baird as A. rossii. For my own part, I can only speak 
to having heard of more than one species of Snow-Goose. There 
is now a specimen of A. rossii to be seen in the British Museum, 
the locality of which is supposed to be California; it was pur¬ 
chased in Paris. 
AnSER CiERULESCENS. 
When the f Fauna Bor.-Am.’ was written, there was no 
suspicion of this being a true species in N. America; hence 
Dr. Richardson noted that the young and old Snow-Geese were 
said to go in separate flocks : this point, however, Mr. Barnston 
/ Ibis/ vol. ii. p. 256) has perfectly cleared up by his labours in 
the field; while Mr. Cassin arrived at the same conclusion in the 
museum. By the observations of the former, the “ Blue Wavy” 
(figured originally by Edwards) seems to prevail on the eastern 
side of Hudson's Bay and in Labrador. I cannot trace it inland 
to the westward. I have received two specimens from York 
Factory, and, on careful comparison at the British Museum with 
Mr. George Grey, can detect no difference in form or size from 
A. hyperboreus. The specimens, however, have every appearance 
of being adults; and we must take this as another example 
of two species being undistinguishable except by colour. The 
fact of the Blue Wavy being unknown in localities where the 
Snow-Goose is common is perhaps the strongest argument in 
favour of its existence as a species. For other distinctions I 
refer to Mr. Barnston / Ibis/ vol. ii. p. 256). 
Anser gambelii. 
The American White-fronted or Laughing Goose appears, as 
observed by Mr. Barnston, to be more an inland and western 
species, being seldom found in the southern part of Hudson's 
Bay. It is a common bird on the Saskatchawan in spring and 
autumn, at which lattjer season it is to be found in immense 
