Interior of British North America. 55 
corresponded in colour and markings; they measured respectively 
in length 6^ and 6J- inches, and the wings 4 and 4J inches. The 
eyes were brown; feet brownish flesh; bills dark horn-colour, 
except the base of the lower mandible, which was flesh; the 
inside of their mouths yellow; and the second and third quill- 
feathers the longest. On the 5th of June, in the same loca¬ 
lity, I obtained another Thrush, a female by dissection ; the bill of 
the same colour as those mentioned above; feet dull flesh; 
length 7-J inches, wing 4 inches, tarsus 1^ inch. It was so 
much damaged that I did not preserve it, hoping to get another. 
The whole upper parts, including the tail, were of a uniform 
reddish olive; its identity must remain doubtful. T. swainsonii 
is given by Mr. Bernard Boss on Mackenzie Biver north to the 
Arctic Circle. T. alicice has also been found by Mr. Boss in 
the north on the Yukon Biver, to the west of the Bocky Moun¬ 
tains ; it is, however, a bird of the Mississippi valley. 
32. Turdus migratorius. (See ‘Ibis/ vol. iv. p. 4.) 
So widely as the American Bobin is distributed on that con¬ 
tinent, it is unnecessary for me to note the different localities 
where it has been found in the northern interior. Dr. Bichardson, 
during his travels, observed that it hatches its young in latitude 
54° at the end of May, and in 65° by June the 11th. Its first 
occurrence at Fort Franklin, in 65°, he notes on May 20th; at 
Fort Chepeweyan, 58J°, May 7th; and Fort Carlton, April 22nd. 
In 1858, however, when I was at this last post, the Bobin arrived 
from the south on the 16th of that month; but there can be no 
question that in those latitudes which are frozen up for nearly 
half the year, both the arrivals in spring and the departures in 
autumn are very much dependent on the progress of the seasons. 
For instance, in the following year the Bobin did not reach Bed 
Biver Settlement, three degrees further to the southward, before 
the fourth week in April. In 1858 I observed this bird on the 
north branch of the Saskatchawan Biver till the 28th of October. 
Mr. Boss notices its abundance on the Mackenzie, to the Arctic 
Circle. 
Turdus NjEVius. 
A specimen is mentioned under the name of Orpheus meruloides 
