. A manual for the study of insects. Insects. COLEOPTERA, 575 few, as the Striped Squash-beetle, bore in the roots or stems of plants. This is a large family, of which about six hundred North American species are known. The following il- lustrations will serve to show the variations in form and habits : The Long-horned Leaf-beetles, Donacia (Do-na'ci-a).— These are the common Leaf-beetles that are liable to be mistaken for Cerambycids. They are of elongated form, with slender antennae (Fig. 700). They measure from a quarter to a half inch in length, and are of a me- tallic color—either greenis
. A manual for the study of insects. Insects. COLEOPTERA, 575 few, as the Striped Squash-beetle, bore in the roots or stems of plants. This is a large family, of which about six hundred North American species are known. The following il- lustrations will serve to show the variations in form and habits : The Long-horned Leaf-beetles, Donacia (Do-na'ci-a).— These are the common Leaf-beetles that are liable to be mistaken for Cerambycids. They are of elongated form, with slender antennae (Fig. 700). They measure from a quarter to a half inch in length, and are of a me- tallic color—either greenish, bronze, or purplish. The lower side of the body is paler, and is clothed with very fine hair which serves as a water-proof coat when the insect is submerged. The larv^ae fig. 700. feed upon the roots or in the stems of aquatic plants; and the adults are found on the leaves of the same plants. We have many species, but they resemble each other so closely that it is difficult to separate them. The Three-lined Lema, Lema trilineata (Le'ma tri-Iin-e- a'ta).—This insect is common, feeding on the leaves of potato. The beetle is a quarter of an inch long, yellow, with three black stripes on the wing-covers. The eggs are laid in small clusters on the leaves. The larvse feed on the leaves, and can be easily recognized by a habit they have of covering their backs with their own excrement. They transform in the ground in earthen cells. There are two broods each year ; the second hibernates in the ground as pupoe. The Asparagus-beetle, Crioceris asparagi (Cri-oc^e-ris as- par'a-gi).—This is a small, red, yellow, and black beetle, that gnaws holes into the heads of young asparagus, and lays oval, black eggs upon them. The larvse, which are small, brown, slug-like grubs, also feed upon the young heads in the spring, and later in the season a second brood feed upon the full-grown plant. Figure 701 represents a head of as-. Please note that these images are extracted from scanned pa
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1895
