. A manual for the study of insects. Insects. CHAPTER XXI. Order Coleoptera (Co-le-op'te-ra). The Beetles, The members of this order have a pair of horny wing-covers, called elytra, which meet in a straight line down the backy and beiteath which there is a single pair of membranous wings. The mouth-parts are formed for biting. The metamorphosis is complete. Beetles can be readily distinguished from all other in- sects except earwigs by the possession of horny, veinless wing-covers which meet in a straight Hne down the back (Fig. 599); and they differ from ear- wigs in lacking the pincer - like
. A manual for the study of insects. Insects. CHAPTER XXI. Order Coleoptera (Co-le-op'te-ra). The Beetles, The members of this order have a pair of horny wing-covers, called elytra, which meet in a straight line down the backy and beiteath which there is a single pair of membranous wings. The mouth-parts are formed for biting. The metamorphosis is complete. Beetles can be readily distinguished from all other in- sects except earwigs by the possession of horny, veinless wing-covers which meet in a straight Hne down the back (Fig. 599); and they differ from ear- wigs in lacking the pincer - like ap- pendages at the tail end of the body characteristic of those insects (see page 103). Beetles also differ from earwigs in having a complete meta- morphosis. The name of the order, Coleop- ^^^' 599. tera, is from two Greek words: coleos, a sheath; d^ndpteron, a wing. It refers to the sheath-like structure of the elytra (el'y-tra) or wing-covers, which were formerly believed to be modified wings. These wing-covers apparently occupy the position of the fore wings, and can be moved somewhat as wings are moved. Their structure, however, resembles that of the body-wall rather than that of wings ; and in some beetles (, Dytiscus)Y\xA\mtnts of the fore wings exist beneath the elytra. 494. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Comstock, John Henry, 1849-1931; Comstock, Anna Botsford, 1854-1930. joint author. Ithaca, N. Y. , Comstock Pub. Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1895
