. The transformations (or metamorphoses) of insects (Insecta, Myriapoda, Arachnida, and Crustacea) : being an adaptation, for English readers, of M. Émile Blanchard's "Metamorphoses, moeurs et instincts des insects;" and a compilation from the works of Newport, Charles Darwin, Spence Bate, Fritz Müller, Packard, Lubbock, Stainton, and others. t. Proboscis. jaws of many hard-skinned beetles. The change from the leaf-cutting jaws of the caterpillar to the suction tube of the butterflyis a proof of this unity of plan, and that with different instincts,habits, and methods of life there arise diffe
. The transformations (or metamorphoses) of insects (Insecta, Myriapoda, Arachnida, and Crustacea) : being an adaptation, for English readers, of M. Émile Blanchard's "Metamorphoses, moeurs et instincts des insects;" and a compilation from the works of Newport, Charles Darwin, Spence Bate, Fritz Müller, Packard, Lubbock, Stainton, and others. t. Proboscis. jaws of many hard-skinned beetles. The change from the leaf-cutting jaws of the caterpillar to the suction tube of the butterflyis a proof of this unity of plan, and that with different instincts,habits, and methods of life there arise different modifications ofstructures. The examination of the mouth of an eating or man-dibulate insect is very instructive. Take, for instance, one ofthe grasshopper tribe, and examine the different pieces attachedaround the opening down which the food passes into the stomach. The mouth is provided with six articulated pieces :—a labrum,or the upper lip, two mandibles, two jaws, or maxillae, and an 22 TKANSFOKMATIONS OF INSECTS. inferior labrum. Tlie curved appendages to the maxilLx and thelower labrum are palpi. Now in caterpillars the upper lip is wellgrown, and there are two strong mandibles working from withoutinwards, two jaws, and a lower lip. There is thus the clearestresemblance between the mouth of the grasshopper, when it is a. ANATOMY OF THK MOUTH OF Locusta viridissima. I. The labrum or upper lip. 2. Mandibles. 3. Jaws. 4. The lower labrum. 5. Tongue. perfect insect, and that of the immature caterpillar. Let meta-morphosis go on, and the browsing caterpillar becomes a suckingbutterfly; though at first, no one would think there was the slightestconnection between the early and the late condition of the slender trunk and two scale-like feelers, or palpi, below it arethe only apparent structures of the butterflys mouth. But acareful examination reveals the fact that the three pairs of mouth STRUCTUKES IMPLICATED IN METAMORPHOSIS. 23 pieces are all present, altho
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Keywords: ., bookcentury1800, bookdecade1870, booksubjec, booksubjectcrustacea
