In this projecting part there appeared to be an opening.

When it was taken out of the water it stood upright on its legs and crawled a little like a large beetle, but soon died.

In the water it swam with the legs, and the last joint appeared to be feathered.

It will be seen that there is a great irregularity in the position of the legs of this insect.

The specimen appeared to me to be in some respects imperfect; but I figured it exactly as it was, without blindly guessing at its perfect state.