Prof. A. J. Cook says of these insects that are so troublesome to the fruit grower:

" Parasites, mites and lady beetles all prey upon these fell destroyers, but though efficient aids, they are not always enough to exterminate the lice, and then the trees fall victims to these ruthless suckers. I have seen trees in all parts of our State thus enfeebled or destroyed.

"The old remedy, soft soap, or a strong solution of the same, will surely vanquish this enemy if it is applied in early June and again three weeks later. I have proved the efficacy of this treatment over and over again. The trees at once put on new vigor, and in a short time only dead lice could be found. To apply this specific I know of no better way than to use a cloth and scrub by hand. To be sure, we can, if dainty, use a brush like a shoe brush, but I like to go at it with a good cloth, when, with sleeves rolled up, I make pretty sure that no louse escapes.

"For the past few years I have changed the substance by adding crude carbolic acid, which I think improves it, especially if but one application is to be made; and we know that at this busy season the second application is apt to be neglected.

" I heat to the boiling point one quart of soft soap to two gallons of water, and while still hot thoroughly stir in one pint of crude carbolic acid. This may be applied as before. This carbolic acid mixture retains its virtue, I think, longer than does the soap alone, and so is especially desirable when but one application is to be made, as described above.

"Like the arsenites, so this carbolic acid and soap mixture is of triple value. Not only does it kill the dreaded lice but it also keeps off the borers, which are also serious pests in the orchards of Michigan. The old borers, Saperda Candida, and S. cretata, are quite common and destructive in our State, while the big-headed borer, Chryso-bothris femorata, is even more prevalent and harmful. I have demonstrated beyond question that these enemies are surely kept away by the same treatment, applied at the same time for which we use it to ward off the scale lice. No wonder, then, that our trees put on such new life and vigor after this annual scrubbing".