. Elementary entomology. Insects. J GROWTH AND TRANSFORMATIONS OF INSECTS 53 from the thorax. In another week the skin is shed for a fourth time, and the fifth stage is easily recognized as a full-grown nymph, being one third inch long, and the wing pads and thorax being much enlarged. After feeding for another nine days it molts for the last time and transforms to the winged adult, the whole growth having re- quired from four to five weeks. Adult. The new adults be- come numerous in August, but neither mate nor lay any eggs during that season, continuing to feed until the first frosts of autu
. Elementary entomology. Insects. J GROWTH AND TRANSFORMATIONS OF INSECTS 53 from the thorax. In another week the skin is shed for a fourth time, and the fifth stage is easily recognized as a full-grown nymph, being one third inch long, and the wing pads and thorax being much enlarged. After feeding for another nine days it molts for the last time and transforms to the winged adult, the whole growth having re- quired from four to five weeks. Adult. The new adults be- come numerous in August, but neither mate nor lay any eggs during that season, continuing to feed until the first frosts of autumn blacken the leaves, when they rapidly disappear into winter During the middle of the day they fly here and there in search of suitable hibernating places, and finally hide along the edges of FIG. 66. First three stages of the nymphs woodlands, or beneath leaves, of the differential locust. (Much enlarged) . under logs, boards, or whatever shelter may be adjacent to the garden, where they remain dormant until called back to activity by the warm sunshine of late spring. Life history of the differential locust (Melanoplus differ entialis). Incomplete metamorphosis. Through- out the Mississippi Valley, from Illi- nois southward, the differential locust is one of the most common and de- structive grasshoppers, and is an excel- lent example of several of our more abundant and injurious species whose life histories and feeding habits are, in general, very similar. 1 The life history as given is for New England; farther south the transforma- tions take place earlier and more rapidly, and in the extreme south there may be more than one 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 Sanderson, Dwight, 1878-1944; Jackson, C. F. (Cicero Floyd), b. 1882. Boston, New York [etc. ] Ginn and Compa
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