Although to anyone merely travelling through it, this upper forest seems, especially in the cold season, to be singularly deficient in animal life, yet to those who will carefully observe, as they ramble through these woods, there are numerous small living creatures well worth careful study. One cannot pass many yards along a forest path without noticing here and there a long white bag hanging on the trees and bushes. These vary in length from about six inches to a foot, or even eighteen inches, and are a long oval in shape; the upper part shines with a silky lustre, and the whole would do so, but for its being filled at the lower part with a mass of dark brown earthy substance, which soils its purity. On cutting open the upper portion of the bag, which is tough and strong, it is found to be filled with a mass of brown caterpillars, about an inch and a half long, all wriggling about when thus disturbed in their comfortable home. The dark substance is evidently the droppings of these caterpillars; and the opening at the lower end, sometimes small holes around it, give exit and entrance, for generally two or three of the insects are seen crawling on the outside. It would appear, therefore, that this silken bag is the nest or home spun by the caterpillars, a common habitation in which they undergo the next change before becoming perfect insects. One always sees that the branches near that on which the bag is suspended are stripped of the leaves, no doubt by its inmates. I noticed that, a day or two after I had cut open one of these bags, a thin film of web had been spun over the opening, so as to close up the entrance I had unceremoniously made into the privacy of the little community. [Sidenote: ANTS]