. Elementary lessons on insects. Insects. 16 ELEMENTARY LESSONS ON INSECTS tion of the synthorax with the abdomen, under the pro- tection and covering of hardened fore wings. Note that these meet in a straight line down the middle of the back. Lift a fore wing and find the hind wing underneath, and note that it is folded both crosswise and lengthwise. (To be con- tinued later, page 94.) 6. Examine an adult wasp, noting expecially (1) the elbowed antennae; (2) the small hind wings, hitched on to the rear margin of the fore wings by a row of minute hook- lets, so that the two pairs function as a
. Elementary lessons on insects. Insects. 16 ELEMENTARY LESSONS ON INSECTS tion of the synthorax with the abdomen, under the pro- tection and covering of hardened fore wings. Note that these meet in a straight line down the middle of the back. Lift a fore wing and find the hind wing underneath, and note that it is folded both crosswise and lengthwise. (To be con- tinued later, page 94.) 6. Examine an adult wasp, noting expecially (1) the elbowed antennae; (2) the small hind wings, hitched on to the rear margin of the fore wings by a row of minute hook- lets, so that the two pairs function as a single unit; (3) the consolidation of the basal segment of the abdomen with the metathorax, and (4) the sting at the tip of the abdomen. (To be continued later, page 124.) 7. Examine prepared slides showing special forms of antennae and feet in a number of common insects. This brief survey of external parts will show the plan on which an insect skeleton is built, with certain modifica- tions in its details, and will give some idea of what may be expected in other 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 Needham, James G. (James George), 1868-1956. Springfield, Ill. , Baltimore, Maryland, C. C. Thomas
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Keywords: ., bookcentury1900, bookcollecti, bookdecade1920, booksubjectinsects
