. Nature sketches in temperate America, a series of sketches and a popular account of insects, birds, and plants, treated from some aspects of their evolution and ecological relations . hey mature the following summer,in July and August. In an effort to determine whether thislocust changes color at the critical stage of the last moult toresemble the ground upon which it lives, I tried a number ofexperiments. A few of these, with the resulting conclusions,are given herewith: On July twenty-ninth, I subjected two nymphs, one rust-red, the other gray-speckled over the body, to a residence withina
. Nature sketches in temperate America, a series of sketches and a popular account of insects, birds, and plants, treated from some aspects of their evolution and ecological relations . hey mature the following summer,in July and August. In an effort to determine whether thislocust changes color at the critical stage of the last moult toresemble the ground upon which it lives, I tried a number ofexperiments. A few of these, with the resulting conclusions,are given herewith: On July twenty-ninth, I subjected two nymphs, one rust-red, the other gray-speckled over the body, to a residence withina screen-covered vivarium. On the bottom of the enclosureto one side was placed a layer of fight sand, and on the otherside, separated by a screen partition, was a covering of darkearth. The rust-red form was placed in the side containing thelight sand, and the gray-speckled form on the dark earth. These insects had been confined here bjut a few hours beforethey started to moult. At , of the same day, the redform, after climbing on the vertical screen partition, com-menced to moult, and by had entirely emerged from ECOLOGY —INTERPRETATION OF ENVIRONMENT 315. A Carolina Locust which has been killed by a fungus disease. 346 NATURE SKETCHES IN TEMPERATE AMERICA the nymph skin, thereby entering the adult stage. In twentyminutes the body was pigmented with red, the colorationbeing of the same general character as that of the pale, wrinkled wings did not take on the black pigmen-tation immediately, but after one-half hour they graduallystretched out to full length and dried, so that they werefinally brought together like a folding fan, and closed to the tegmina, in the meantime, were stiffening and they wereaided to the sides by the hind tibise, and pressed together bythe femora into their normal straight position. Shortly after the moulting of the red individual, the graynymph referred to also underwent ecdysis. When the resultingadult became
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbirds, booksubjectins
