132 Bulletin Wisconsin Natural History Society [Vol. 13, No. 3 
that the only king rail found in the formation was located, and 
here also many sandpipers were seen. A pair of baldpates visited 
the pool regularly, and, when they were collected it was found 
that their stomachs contained great numbers of Diaptomus, 
which were most abundant in the pond. Few birds visited the 
apparently equally good pond but a few feet away, though they 
must certainly have known of its existence. The small clam 
Sphaerium ocddentale was the only form found in the first pond 
Fig. 2. The First Pond. 
and not in the second, and this like-wise occurred in some 
numbers in the stomachs of practically all the birds collected 
while feeding about the ponds. On October 5, when this pool 
was entirely dry, a hibernating Gordius was found five inches 
below the surface, in the clay bed. The significance of this 
becomes more marked when it is noted that out of one hundred 
grasshoppers ( Melanoplus femur-rubrum ) caught in the sur- 
rounding fields on September 30, 1913, forty-two were found 
