Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . ablack, bright red or yellow banded abdomen. This is Euchroviia ipomcece, which flies rather heavily and clumsily during themiddle of the day in bright sunlight. As against this insect thearsenites are indicated, or, where only a few plants are to beprotected, hand-picking may be resorted to. In vineyards there may be often seen feeding on the undersides of the leaves little, black-spotted, yellow, somewhat hairylarvae, less than half an inch in length, ranged side by side as
Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . ablack, bright red or yellow banded abdomen. This is Euchroviia ipomcece, which flies rather heavily and clumsily during themiddle of the day in bright sunlight. As against this insect thearsenites are indicated, or, where only a few plants are to beprotected, hand-picking may be resorted to. In vineyards there may be often seen feeding on the undersides of the leaves little, black-spotted, yellow, somewhat hairylarvae, less than half an inch in length, ranged side by side asclosely as possible, and retreating as they eat until a leaf is com-pletely skeletonized. When this kind of larva is full grown itspins a white, flattened cocoon, in which it changes to a pupaand from which it emerges in due time as a little, narrow-winged, black moth wearing a red collar. This is the Harrisina THE INSECT WORLD. 265 americana, and certain varieties of grapes are occasionally in-jured by its larva. Feeding- in colonies, as it does, the insect iseasily checked by local applications of the Grape-leaf on which larvae of Hairisina amevicana are feeding. We now enter into a series of species the caterpillars of whichare known as woolly bears, from the fact that they are allclothed with long hair. In some cases this hair is so dense thatthe body of the caterpillar itself cannot be seen at all, and allthese are of the Arctiid series. They spin a small quantity ofsilk only, and use the hair with which they are clothed in con-junction with it to form the cocoon. Under the microscope itmay be seen that it is furnished with small spurs or branches, bymeans of which the insect is able to produce a felt-like material,needing only a small quantity of silk to hold it together in atissue sufficiently firm for its purpose. Perhaps the majority ofthe caterpillars of this series feed upon low plants, and frequentlyit does not matter much what. Plantain seems to be a co
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