In about a week I gave him a large house-fly, which he did not catch, not having room enough to make a pitfall.

I gave him no more food till the next March.

About the first of March, when flies began to be plenty, I commenced to feed him again.

He found it rather awkward to catch insects in the bottle, as there was not room enough to make a pitfall, and his inability to move forward made it hard for him to seize an insect, unless he met it directly between his jaws.

He soon, however, made pitfalls half an inch in diameter, which answered the purpose.