. Elementary lessons on insects. Insects. 58 ELEMENTARY LESSONS ON INSECTS in the big blue and green darner dragonflies, but it is wanting in the skimmers. With a damselfly in hand, note: 1. The differently shaped head and wider spacing of the compound eyes. 2. The slenderness of the body and the greater obliquity of the thorax. 3. The similarity of fore and hind wings. 4. In the male the four appendages (two pairs) instead of three at the tip of the abdomen. 5. In the female the sharp-bladed ovi- positor that is used for cutting holes for eggs in the stems and leaves of green plants. b. The N
. Elementary lessons on insects. Insects. 58 ELEMENTARY LESSONS ON INSECTS in the big blue and green darner dragonflies, but it is wanting in the skimmers. With a damselfly in hand, note: 1. The differently shaped head and wider spacing of the compound eyes. 2. The slenderness of the body and the greater obliquity of the thorax. 3. The similarity of fore and hind wings. 4. In the male the four appendages (two pairs) instead of three at the tip of the abdomen. 5. In the female the sharp-bladed ovi- positor that is used for cutting holes for eggs in the stems and leaves of green plants. b. The Nymph With a dragonfly nymph in hand note: I. In the head. 1. Short antennae, less slender than in the adult. 2. Compound eyes, less expanded than in the adult. 3. Sharply toothed jaws of the same carnivorous type. 4. A very remarkable grasping lower lip that is hinged in the middle and folded backward beneath the head. When closed its tip rests against the lower part of the face, but it can be thrust far forward like an arm for grasping prey, and its tip is armed with hooks and. — The nymph of the damselfly, (Enal- lagma signatum verlic- alis).. 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
