. Insectes nuisibles de la ferme et le jardin. Avec un chapitre sur les insectes utiles. Les insectes. De l'GAEDEK ET FAEM fera appel. 259 LA GRAPE LEAF-BAC, (Tettigonia vitis, Harris.) dans de nombreuses régions du pays, si l'on passe à travers un vignoble en juillet ou août, il sera contrarié par les nuages d'un petit insecte, il Avhich comme familles, apparaît comme s'il s'agissait d'une sale couleur blanche. Ces insectes sont généralement connus comme "les thrips," un nom appartenant à un genre différent, et qui devrait être remplacée par Leaf-bac. L'insecte appartient à l'ordre des Hémiptères, ou punaises. C'est la Tettigonia vitis

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. Injurious insects of the farm and garden. With a chapter on beneficial insects. Insects. OF THE FAEM AND GAEDEK. 259 THE GRAPE LEAF-HOPPER, (Tettigonia vitis, Harris.) In many parts of the country, if one passes through a vineyard during July or August, he will be annoyed by the clouds of a small insect Avhich, as it ilies, appears as if it were of a dirty white color. These insects are generally known as "Thrips, " a name belonging to a different genus, and which should be superseded by Leaf-hopper. The insect belongs to the Order Hemiptera, or true Bugs. It is the Tettigonia vitis of Harris (though some authors place it in Erythroneurd), who thus describes it: " In its perfect state it measures one-tenth of inch in length. It is of a pale-yellow color; there are two little red lines on the head. The back part of the thorax, the scutel, the base of the wing-covers, and a broad band across their middle are scarlet; the tips of the wing-covers Fig. 156.—GRAPE are blackish, and there are some little LEAT-HoppEii. j.g^ li^eg between the broad band and the tips. The head is crescent-shaped above, and the eyelets are situated just below the ridge of the front." The insects appear upon the underside of the leaves in June, but are not much noticed, as they do not have their wings until later. They pass their larvae state quietly, sucking at the juices of the leaves, which they penetrate with their beaks, though if disturbed at this time, they leap from leaf to leaf in a lively manner. They undergo all their changes on the leaves, and their empty skins may be found on the underside of the leaves, or upon the ground beneath the vine, in great numbers. The insect probably hibernates in the perfect state, hid- den in the rubbish and fn tiifts of grass. When present in great numbers, they rob the vine of its proper nutri-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloratio

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