"G. P." Norwich, Conn., says: "I inclose a leaf or two from a crab-apple tree; you see the edge of the leaf is rotted, and cemented down; I find eggs of some kind enclosed; I find no worms on the tree, but nearly all the leaves thus rolled, and being thus covered I am at a loss how to get at the eggs, to kill them, and fear a crop of worms will be developed. How shall I fight this pest? What is it, only on this one tree?"

[What our correspondent takes for eggs, are the excrements of an insect that has wholly disappeared. It is a leaf-roller, but there are numbers in this class, and there is nothing to determine which particular one has done this work. For want of this knowledge, there is no way to help our friend. - Ed. G. M].