150 Brewer on the Rocky Mountain Golclen-eye. 
River in the winter. Examples have been procured, from time to 
time, in the Boston market, by Mr. William Brewster and others, 
most of which are known to have been shot within the limits of 
Massachusetts. 
Mr. E. W. Nelson states, that it is a. winter resident in the 
waters of Lake Michigan, and that at this season it is also found 
irregularly throughout the State of Illinois. An example was pro- 
cured on the Wabash, near Mount Carmel, by Prof. Stein, in 
December, 1874, and Dr. Hoy procured one in 1860 at Racine. 
They are believed to be not uncommon on Lake Michigan during 
the winter, but the season is not favorable either for procuring 
them or ascertaining just how common they are. 
In 1872, Mr. Henshaw procured two examples on Utah Lake, 
and he is quite inclined to the belief that this species occurs there 
regularly, and in considerable numbers. He was assured by the 
gunners that more or less were shot there every winter, though it 
was a less abundant species than the common Golden-eye, from 
which they could readily distinguish it. 
Mr. Edwin Carter, of Colorado, who was probably the first to 
actually secure the nest and eggs of this species within the limits of 
the United States, assures me that he has been for many years well 
aware of the common presence of this species among the mountains 
of that region. A fine set of seven eggs procured by that gentle- 
man are now in the Museum of Comparative Zoology at Cambridge. 
Mr. Carter writes me, that “ the usual nest complement of Barrow’s 
Golden-eye is from six to ten, varying with the age and vigor of the 
parents. Last year (1876) we took a nest of ten that contained 
large embryos ; we also took another set of six. Another clutch 
(the one sent to the Museum) consisted of seven. I have also met 
with several young broods with from six to eight, and one with ten. 
They nest in hollow trees, and it is surprising to see to what small 
cavities, in some instances, they can accommodate themselves. 
The present season (1877) I have examined a great many trees, and 
every one that had a suitable opening either contained an occupant 
or indicated recent nesting by egg-shells and other marks.” 
This Duck has not been detected in California, but Dr. Cooper 
thinks that it undoubtedly occurs among the mountains of the 
northeastern part of the State. Mr. Dali found it present but rare 
on the Yukon River. Examples were procured by Bischoff at Sitka, 
and a single individual was taken by Mr. M. McLeod, June 29, 1863, 
