. Insects, injurious and beneficial, their natural history and classification, for the use of fruit growers, vine growers, farmers, gardeners and schools . quentlythickened toward the tip. These insects usually fly about only at night or in the eve-ning ; their colors are usually dull, mostly some shade of gray,and the hind wings are seldom colored as brightly as the foreones, being usually of a dirty white or smoky color. Whenat rest the wings usually cover the back like a steep roof, thefore wings concealing the hind ones. A very few of the caterpillars (such as those of the PlumeMoths) susp
. Insects, injurious and beneficial, their natural history and classification, for the use of fruit growers, vine growers, farmers, gardeners and schools . quentlythickened toward the tip. These insects usually fly about only at night or in the eve-ning ; their colors are usually dull, mostly some shade of gray,and the hind wings are seldom colored as brightly as the foreones, being usually of a dirty white or smoky color. Whenat rest the wings usually cover the back like a steep roof, thefore wings concealing the hind ones. A very few of the caterpillars (such as those of the PlumeMoths) suspend themselves when about to pupate; but the CLASSIFICATION OF INSECTS INTO FAMILIES. 61 greater number either spin cocoons, or enter the earth andform smooth cells in which to undergo their transformations. Section I.—Butterflies. (Rhopalocera.) These insects are divided into five Families, as follows :Swallow-tails (Papilionidx).—These Butterflies have thehind wings produced into a broad tail, and are hollowed outnext the body (as the Turnus Butterfly, Fig. 190); the ante-rior pair of tibiae have a stout spur near the middle of each. Fig. These Butterflies are usually of a large size, and the colorsare mostly yellow and black. Their caterpillars live exposed upon the leaves (such as thecaterpillar of the Turnus Butterfly, Fig. 49), sometimes spin-ning a web upon the upper surface of a leaf, upon whichthey rest when not feeding. When about to pupate they sus-pend themselves by the hind part of the body, and a transverseloop of silken threads passed around the fore part of the body. White and Yellow Butterflies (Pieridse).—These But-terflies have the hind wings rounded behind, or not tailed, andthe inner margin is concave ; the anterior tibiae are destitute ofa spur at the middle ; the colors are white and black (as thoseof the Imported Cabbage Butterfly, Fig. 191), or yellow and 62 NATURAL HISTORY OF INSECTS. black, sometimes tinged with green. Their caterpillers l
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectinsects, bookyear1883
