. The biology of insects. Insects -- Biology. 270 THE BIOLOGY OF INSECTS in ants, and bees, and wasps the vertical dimension of the abdomen approaches, equals, or exceeds the horizontal, as it does among the more highly organised members of the various groups of two-winged flies—gnats, midges, and the house-fly group. Similar proportions characterise most of the Lepidoptera (moths and butterflies). In dragon-flies also the body is, as a rule, deeper than broad ; these insects have elongate abdomens which being narrow offer Httle resistance to the air in swift flight; it is interesting to r«^'.
. The biology of insects. Insects -- Biology. 270 THE BIOLOGY OF INSECTS in ants, and bees, and wasps the vertical dimension of the abdomen approaches, equals, or exceeds the horizontal, as it does among the more highly organised members of the various groups of two-winged flies—gnats, midges, and the house-fly group. Similar proportions characterise most of the Lepidoptera (moths and butterflies). In dragon-flies also the body is, as a rule, deeper than broad ; these insects have elongate abdomens which being narrow offer Httle resistance to the air in swift flight; it is interesting to r«^'. Fig. 67.—a, Bed-bug (Cimex lectularius), dorsal view, X 5 ; 6, diagram- matic cross-section of Cimex to show dorso-ventral flattening ; c. Dog- flea {Ctenocephalus cams), lateral view, X 12 (from L. O. Howard); d, diagrammatic cross-section of Flea to show lateral flattening. remember that their grubs crawling on the bottom of pools and streams have bodies often distinctly broader than deep. In contrast to the flattened cockroaches, the grasshoppers and locusts, belonging to the same order (Orthoptera) as they, have bodies distinctly deeper than broad. These insects are often strong fliers, and instead of running along the ground, they spend much of their time crawling on the stems and leaves of plants, whence by the action of their. 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 Carpenter, George H. (George Herbert), 1865-1939. New York, The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyorkthemacmilla
