When I first observ’d the former of these Insects, or Mites, I began to conjecture, that certainly I had found out the vagabond Parents of those Mites we find in Cheeses, Meal, Corn, Seeds, musty Barrels, musty Leather, &c. these little Creatures, wandring to and fro every whither, might perhaps, as they were invited hither and thither by the musty steams of several putrifying bodies, make their invasions upon those new and pleasing territories, and there spending the remainder of their life, which might be perhaps a day, or thereabouts, in very plentiful and riotous living, might leave their offspring behind them, which by the change of the soil and Country they now inhabite, might be quite alter’d from the hew of their _primogenitors_, and, like _Mores_ translated into Northern _European_ Climates, after a little time, change both their skin and shape. And this seems yet more probable in these Insects, because that the soil or body they inhabit, seems to be almost half their parent, for it not only hatches and brings those little eggs, or seminal principles, to perfection, but seems to augment and nourish them also before they are hatch’d or shaped; for it is obvious enough to be observ’d, that the eggs of many other Insects, and particularly of Mites, are increas’d in bulk after they are laid out of the bodies of the Insects, and plump’d sometimes into many times their former bigness, so that the bodies they are laid in being, as it were, half their mothers, we shall not wonder that it should have such an active power to change their forms. We find by relations how much the _Negro_ Women do besmeer the of-spring of the _Spaniard_, bringing forth neither white-skinn’d nor black, but tawny hided _Mulattos_. Now, though I propound this as probable, I have not yet been so farr certify’d by Observations as to conclude any thing, either positively or negatively, concerning it. Perhaps, some more lucky diligence may please the curious Inquirer with the discovery of this, to be a truth, which I now conjecture, and may thereby give him a satisfactory account of the cause of those creatures, whose original seems yet so obscure, and may give him cause to believe, that many other animate beings, that seem also to be the mere product of putrifaction, may be innobled with a Pedigree as antient as the first creation, and farr exceed the greatest beings in their numerous Genealogies. But on the other side, if it should be found that these, or any other animate body, have no immediate similar Parent, I have in another place set down a conjectural _Hypothesis_ whereby those _Phænomena_ may likely enough be solv’d, wherein the infinite wisdom and providence of the Creator is no less rare and wonderfull. * * * * * Observ. LI. _Of the _Crab-like_ Insect._