. Elementary zoology. Zoology. BRANCH ARTHROPODA ; CLASS INSECT A: THE INSECTS 291 most of the internal organs of the larva (fig. 55) and a rebuilding of the organs of the adult from primitive be- ginnings. The habits of the larvae of insects with complete meta- morphosis and of the young of some insects with incom- plete metamorphosis often differ markedly from the. Fig. 55.—A cross-section of the body of the pupa of a honey-bee. showing the body cavity filled with disintegrated tissues, and (at the bottom) a budding pair of legs of the adult, the larva being wholly legless. (Photo-micrograph
. Elementary zoology. Zoology. BRANCH ARTHROPODA ; CLASS INSECT A: THE INSECTS 291 most of the internal organs of the larva (fig. 55) and a rebuilding of the organs of the adult from primitive be- ginnings. The habits of the larvae of insects with complete meta- morphosis and of the young of some insects with incom- plete metamorphosis often differ markedly from the. Fig. 55.—A cross-section of the body of the pupa of a honey-bee. showing the body cavity filled with disintegrated tissues, and (at the bottom) a budding pair of legs of the adult, the larva being wholly legless. (Photo-micrograph by Geo. O. Mitchell.) habits of the adults, and as the habits and instincts of insects are remarkably specialized, the study of their be- havior and of the structural and physiological modifica- tion which their varied habits of life have brought about is of much interest and significance. In later paragraphs this phase of insect study will be again referred to. Classification.—Much attention has been paid to the classification of insects and the 300,000 (approximately) known species have been variously grouped together into orders by different entomologists. A subdivision of the class Insecta into five orders was proposed by Linnaeus about 1750 and was used until comparatively recently. Since then, however, numerous other arrangements have been proposed, all of them agreeing in increasing the. 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937. New York : H. Holt and company
Size: 1680px × 1487px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
