201 Rattle of snake

The reader is here tantalized to enquire what can be your explanation of the rattle²

It would relieve him if you have no guess could you say so—

Qy. Why do moths & certain gnats fly into candles & why are they not all on their way to the moon, at least when the moon is in the horizon—

I formerly observed that they fly very much less at candles on a moon-light night. Let a cloud pass over & they are again attracted to the candle—

211. l. 7 from bottom

The passing over imperfect instincts tantalizing—

qy flies mistaking the odour of the (Drossera?) for carrion & getting caught— one or two sentences might do—an example wanted because the ignorance so great & the optimists sure to be up in arms—

Afterwards at p. 218 the ostrich is given—but an earlier example would interest.