I do not think that any one can trace out the line of demarcation between reason and instinct. Instinct in many points in wonderful, especially among insects, but where it is wonderful, it is a blind obedience, and inherited from generation to generation. We observe, as in the case of the bees, that they obey the truest laws of mathematics, and from these laws they never have deviated from their creation, and that all animals, as far as their self-defence or their sustenance is concerned, show a wonderful blind obedience to an unerring power, and a sagacity almost superior to reason. But wonderful as this is, it is still but instinct, as the progenitors of the race were equally guided by it, and it is handed down without any improvement, or any decay in its power. Now if it could be asserted that the instinct of animals was only thus inherited from race to race, and could "go no farther," the line of demarcation between reason and instinct would at once be manifest, as instinct would be blindly following certain fixed laws, while reason would ever be assisted by memory and invention. But we have not this boasted advantage on the side of reason, for animals have both memory and invention, and, moreover, if they have not speech, they have equal means of communicating their ideas. That this memory and invention cannot be so much exercised as our own, may be true, but it is exercised to an extent equal to their wants, and they look no further; that is to say, that if any want not prepared for, or anything should take place interfering with their habits and economy, instinct will enable them to meet the difficulty. There is nothing more wonderful than the application of mechanical power by ants. No engineer could calculate with greater nicety, and no set of men work together with such combination of force. After they have made ineffectual attempts to remove a heavy body, you will observe them to meet together, consult among themselves, and commence an entire new plan of operations. Bees, also, are always prepared to meet any new difficulty. If the _sphinx atropos_, or death's head moth, forces its way into the hive, the bees are well known, after having killed it with their stings, to embalm the dead body with wax--their reason for this is, that the body was too large for them to remove through the passage by which it entered, and they would avoid the unpleasant smell of the carcass. It may be argued, that instinct had always imparted to them this knowledge; but if so, they must have had a fresh accession of instinct after they had been domiciled with men: for it is well known that the hole in the tree, in which the wild bees form their cells, is invariably too small to admit any animal larger than themselves, and the bodies of such sized animals they could remove with as much ease as they do the bodies of their own dead.