Aphides in general attack the young and softer parts of plants; but this insect seems easily to wound the harder bark of the apple, and by no means makes choice of the most tender part of the branch. They give a preference to certain sorts, but not always the most rich fruits; as cider apples, and wildings, are greatly infested by them, and from some unknown cause other varieties seem to be exempted from their depredations. The Wheeler’s russet, and Crofton pippin, I have never observed to be injured by them. This insect is viviparous, or produces its young alive, forming a cradle for them by discharging from the extremities of its body a quantity of long cottony matter, which, becoming interwoven and entangled, prevents the young from falling to the earth, and completely envelops the parent and offspring. In this cottony substance we observe, as soon as the creature becomes animated in the spring, and as long as it remains in vigor, many round pellucid bodies, which, at the first sight, look like eggs, only that they are larger than we might suppose to be ejected by the animal. They consist of a sweet glutinous fluid, and are probably the discharges of the aphis, and the first food of its young. That it is thus consumed, I conjecture from its diminution, and its by no means increasing so fast as fæcal matter would do from such perpetually feeding creatures. I have not, in any instance, observed the young to proceed from these globular bodies, though they are found at various ages at all times during the season. This lanuginous vestiture seems to serve likewise as a vehicle for dispersing the animal; for though most of our species of aphis are furnished with wings, I have never seen any individual of this American blight so provided, but the winds wafting about small tufts of this downy matter, convey the creature with it from tree to tree throughout the whole orchard. In the autumn, when this substance is generally long, the winds and rains of the season effectually disperse these insects, and we observe them endeavoring to secrete themselves in the crannies of any neighboring substance. Should the savoy cabbage be near the trees whence they have been dislodged, the cavities of the under sides of its leaves are commonly favorite asylums for them. Multitudes perish by these rough removals, but numbers yet remain; and we may find them in the nodes and crevices, on the under sides of the branches, at any period of the year, the long, cottony vesture being removed, but still they are enveloped in a fine, short, downy clothing, to be seen by a magnifier, proceeding apparently from every suture, or pore of their bodies, and protecting them in their dormant state from the moisture and frosts of our climate. This aphis, in a natural state, usually awakens and commences its labors very early in the month of March; and the hoariness on its body may be observed increasing daily: but if an