. Lessons in nature study. Nature study. 62 NATURE STUDY for running. Note the long filaments projecting backward from the posterior tip of the body. Those of the young May-fiies are usually three in number and fringed with hairs. They aid in the locomotion of the insect. Those of the stone-fly are usually two in number, and their use is not known. Some kinds of young May-flies live in ponds. I have been careful to speak of these insects always as 3^011 ng stone-flies and young May-flies. For they are stone-flies and May-flies in their immature, or so-called nymphal condition. The adult stone-
. Lessons in nature study. Nature study. 62 NATURE STUDY for running. Note the long filaments projecting backward from the posterior tip of the body. Those of the young May-fiies are usually three in number and fringed with hairs. They aid in the locomotion of the insect. Those of the stone-fly are usually two in number, and their use is not known. Some kinds of young May-flies live in ponds. I have been careful to speak of these insects always as 3^011 ng stone-flies and young May-flies. For they are stone-flies and May-flies in their immature, or so-called nymphal condition. The adult stone-flies (fig. 34) and May-flies (fig. 35) are winged insects which live in the air, and have a very different appear- ance and very different habits from the young. It is possible that you may be fortunate enough to obtain some of the winged adults from the young which you carry into the schoolroom aquaria. If you can find some young May- flies in a pond, so that you can keep them alive in the permanent quiet water aquarium, your chances for seeing the issuance are very mnch better. There is a certain kind of May-fly whose young I have found abundant in watering troughs in September. Fig 31. .\ Stone. 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 Jenkins, Oliver Peebles; Kellogg, Vernon L. (Vernon Lyman), 1867-1937. joint author. San Francisco, The Whitaker & Ray Company
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