469 
Red-winged Blackbird. Nesting in Station VII. 
Song Sparrow. 
Red-eyed Vireo. 
Warbling Vireo. 
American Redstart. 
Yellow Warbler. 
Ovenbird. 
Northern Yellow-throat. 
Catbird. 
Robin. 
Wood Thrush. 
Bluebird. 
STATION OX VIET. 
(Plates XVI. and XVII.,1.) 
An oval depression 80 by 125 feet in the edge of the woods east 
of the East Branch of the Chicago River, bordering an open field. 
In the spring this depression forms a large pond, two or more feet in 
depth, which supports a varied and abundant fauna. In the sum- 
mer and fall the water evaporates, leaving an open space in the 
woods, with dry, mud-cracked surface which is covered with dead 
leaves. Aquatic vegetation (excepting alge) is rare in this pond, 
only a few flags growing in a wet depression, subject to overflow 
from the larger body of water. 
The characteristic vegetation is as follows. 
In the Pond. 
Alge. Sp. undet. 
Bordering the Pond. 
Iris versicolor. Large Blue Flag. 
Cephalanthus occidentalis. Button-bush. 
In the Forest surrounding the Pond. 
Quercus bicolor. Swamp White Oak. 
Quercus coccinea. Scarlet Oak. 
Ostrya virginiana, Hop Hornbeam. 
The insect and molluscan species thrive well among the thick 
clumps of alge. The following species were secured. - 
