Note 894 — LETTER XXXII.
Reading edition
Clairville Ent. Helvet. ii. 214—. I have seen it asserted in some popular work on Natural History, (the title of which I do not recollect,) that Mantis religiosa has been known to live ten years; and a flea, when fed and taken care of, six. But this is so contrary to experience in other cases, that the statement seems quite incredible.