. Insects, injurious and beneficial, their natural history and classification, for the use of fruit growers, vine growers, farmers, gardeners and schools . CLASSIFICATION OK INSECTS INTO FAMILIES. L03 sometimes called Bark-lice, the females (Fig. 293, lc,) arewingless, while the males (Fig. 293, la,) are each providedwith two more or less transparent wings; the feet are one-jointed and terminate in a single claw. Some species are ovi-parous, while others are viviparous. The Lemon-peel Scale(Fig. 293), the Black Scale (Fig. 294), and the Cottony CushionScale (Fig. 295) belong to this Family. [F
. Insects, injurious and beneficial, their natural history and classification, for the use of fruit growers, vine growers, farmers, gardeners and schools . CLASSIFICATION OK INSECTS INTO FAMILIES. L03 sometimes called Bark-lice, the females (Fig. 293, lc,) arewingless, while the males (Fig. 293, la,) are each providedwith two more or less transparent wings; the feet are one-jointed and terminate in a single claw. Some species are ovi-parous, while others are viviparous. The Lemon-peel Scale(Fig. 293), the Black Scale (Fig. 294), and the Cottony CushionScale (Fig. 295) belong to this Family. [For additionalexamples see Chapter on Scale Insects.] Jumping Plant-lice (Psyllidee).—The insects belonging tothis Family are of small size, and have four transparent wings ;the feet are two jointed ; the antenna? are nine or ten jointed,the last joint terminating in two short bristles; the beak Ffo 296. Fig. Fig. 298. apparently arises from the breast. These insects possess thepower of jumping ; they subsist upon the juices of plants, anda few species live in galls. The Pear-tree Psylla (Fig. 296,adult; 297, pupss,) belongs to this Family. Leaf-hoppers (Cercopidse).—These insects are providedwith four wings, the first pair of which are thick and leathery ;the feet are three-jointed; the ocelliare only two in number, or are entirelywanting; and the antennae are two-joint-ed. In a few species the thorax arises inthe form of a hump or a horn, or like ahigh crest; in others it is produced eachside in the form of a small horn (as inthe Buffalo Tree-hopper, Fig. 155).These insects subsist upon the juices ofplants, and a few kinds envelope them-selves in a mass of froth called frog-spittle. The CaliforniaGrape-vine Hopper (Fig. 298) belongs to this Family.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectinsects, bookyear1883
