105 
COLYMBUS OBSCURUS. 
DUSKY GREBE. 
Head smooth ; body dark brown ; front, 
body beneath, and tips of the secondary 
quill-feathers white. 
Colymbus Obscurus, Lin. Gme. 
Podiceps Obscurus, Lath. 
Le petit Grebe, Buff. 
Black and White Dobchick, Edw. 
Dusky Grebe, Pen. Lath. Bew. Mont. 
Although we have, in conformity with 
authors who have treated on British birds, 
given a separate article under the head 
Dusky Grebe, we are satisfied there is no 
such bird as a distinct species. Every spe- 
cimen we have had an opportunity of ex- 
amining has either been the immature of 
the Eared Or of the Bed-necked species. 
We shall refer our readers to the portrait 
of the immature Eared Grebe, accompany- 
