Insect pests of farm, garden and orchard . all enlarged. (After Riley.) striped with black as shown in Fig. 310, and the larva is yellowish-white, with a longitudinal band along the back, on either side of* Cassida birittata Say. Family Chrysomelid<r. 434 INSECT PESTS OF FARM, GARDEN AND ORCHARD which is a much lighter band. This species differs from the othersin that the larva does not use its fseci-fork for carrying excrement,but merely covers it with cast skins and holds it at an angle fromthe body, instead of close over the back. The Black-legged Tortoise-beetle * This species very clos
Insect pests of farm, garden and orchard . all enlarged. (After Riley.) striped with black as shown in Fig. 310, and the larva is yellowish-white, with a longitudinal band along the back, on either side of* Cassida birittata Say. Family Chrysomelid<r. 434 INSECT PESTS OF FARM, GARDEN AND ORCHARD which is a much lighter band. This species differs from the othersin that the larva does not use its fseci-fork for carrying excrement,but merely covers it with cast skins and holds it at an angle fromthe body, instead of close over the back. The Black-legged Tortoise-beetle * This species very closely resembles the following one, the gol-den tortoise-beetle, but it is not so brilliant, is larger, has blacklegs, and the three black spots on each wing-cover are larger andmore conspicuous. The larva is a bright straw-yellow, with twocrescent-shaped black marks just back of the head and with thespines at the side of the body tipped with black. It is considerablylarger than the larvae of the other species and may be easily vi if; %i/i. Fig. 311.âThe black-legged tortoise-beetle. {Cassida nigripes Oliv.): a, b,larvae; c, pupa; d, beetle. (After Riley.) Eggs at leftâall enlarged. recognized by the characteristic way in which the dung is spreadon the fseci-fork (Fig. 311, a). The larvsc of this species also domore injury than the others, though possibl;;s*not as eggs of the other species are laid singly, so that only one ortwo larva? will be found on a plant, or if more occur they are scat-tered, but the eggs of this species are laid in rows of from three toa dozen, and upon hatching the larvae feed together, thus makingthe injury more noticeable. * Cassida nigripes Oliv. laniily Clirj/somelidae. INSECTS INJURIOUS TO THE SWEET POTATO 435 The Golden Tortoise-beetle * This is a very common species and may be found on morning-glor,y vines throughout the summer. The beetles upon firstemerging are a dull orange color with three prominent black dotson each wing-cover, but
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcet, bookyear1912
