Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 240 A TV ECONOMIC ENTOMOLOGY. CHAPTER VII. THE LEPIDOPTERA. Butterflies and Moths. Under the term Lepidoptera are included those insects popu- larly known as butterflies and moths, in which the wings and body are more or less clothed with scales. These scales often differ greatly in form and size even in the same insect, and yet more in different groups, so that a certain family or series may show types peculiar to it alone. Oddly enough, there is some- FiG. 248. Fig. 249. Scales on w
Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 240 A TV ECONOMIC ENTOMOLOGY. CHAPTER VII. THE LEPIDOPTERA. Butterflies and Moths. Under the term Lepidoptera are included those insects popu- larly known as butterflies and moths, in which the wings and body are more or less clothed with scales. These scales often differ greatly in form and size even in the same insect, and yet more in different groups, so that a certain family or series may show types peculiar to it alone. Oddly enough, there is some- FiG. 248. Fig. 249. Scales on wing of butterfly. b ; the appearance of tongue under a lens at c. times a difference even in the sexes, certain kinds of highly developed scales occurring on the wdngs of the male only, usually confined to limited areas and sometimes concealed by folds. In this order the adult insects are harmless throughout, capable of feeding only upon liquid food by means of a tongue which is usually coiled like a watch-spring on the under side of the head between the palpi. In some instances it is wanting, and on the other hand sometimes becomes enormously developed, reaching a length in some species of from five to nearly seven
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