This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 Excerpt: ...from the time of the first warm weather, about April 15 to May 6, the principal feeding was on the leaves of the wild strawberry (Fvagaria sp.) (Plate IV, fig. 2), and that on May 6 they began to feed on the lower leaves of the black raspberry, which were at this time about one and a half inches long. At tkis latter date the Bui-bank plum and sweet cherry were coming into bloom, while the buds of the Concord grapes were just bursting. By May 10 most of the hoppers were found feeding on the foliage of raspberries, principally on the lower leaves, very few being found more than half way to the top of the bushes. By May 15 all portions of the foliage were attacked (Plate IV, fig. 1). Migration of the insects from raspberries to grapes began May 20, at which time grape foliage appeared as in Plate V, fig. 1. This movement of the insects was at its height about May 24, when grapes were at the stage of growth shown in Plate VI. By June 1, practically all of the leaf-hoppers had made their way to the grape vines. An interesting observation was taken May 24 in a small area of woodland which sheltered many leaf-hoppers during the winter. There were no raspberries, blackberries nor strawberries present in the vicinity so that the hoppers were compelled to feed on other plants. A few vines of the Virginia creeper served as food for a number of the insects, but most of them had been feeding on the leaves of the beech (Fayns r/randifolia) and sugar maple (Acer saecharum), Both species of trees appeared to be badly infested on the lower branches, but, however, beech and maple usually escape attacks from this insect when the favorite foodplants as listed above are present. MATING HABITS. Accounts of the copulatory habits of this species are meagre, but our studies show th...