. Lessons in nature study. Nature study. POND INSECTS 75 mass a number of curious creatures of the appearance shown in figure 47 or figure 48. These are young dragon-flies and can be unmistakablj' known by the peculiar, folded, broad flat under-lip which covers mask-like the whole of the under side of the head, (fig. 49). This lower lip can be unfolded and projected some dis- tance in front of the head (fig. 50). Some of these young dragon-flies live on the very bottom of the pond crawling about in the mud and decaying vegetable matter while others cling to the stems of the water plants, some
. Lessons in nature study. Nature study. POND INSECTS 75 mass a number of curious creatures of the appearance shown in figure 47 or figure 48. These are young dragon-flies and can be unmistakablj' known by the peculiar, folded, broad flat under-lip which covers mask-like the whole of the under side of the head, (fig. 49). This lower lip can be unfolded and projected some dis- tance in front of the head (fig. 50). Some of these young dragon-flies live on the very bottom of the pond crawling about in the mud and decaying vegetable matter while others cling to the stems of the water plants, some distance above the bottom. The young dragon-flies vary considerably in appearance, but there are two principal groups into which they Dragon-fly; short. ^^^ ^^ divided. FirSt, StOUt- bodied, usually rather short ones (fig. 47); and second, long slen- der-bodied ones with three usually long, blade-like flaps pro- jecting backward from the posterior tip of the body (fig. 48.). Collect some of both kinds and carry them, in a jar of water, to the school-room. Here they may be kept alive in the still water aquarium, and their feeding habits, and perhaps their trans, formation into adult, winged dragon-flies, observed. Kill one or two of each kind in the cyanide bottle, and examine the bodies. On the back may readily be seen the growing wings. With a pair of forceps or a pin, unfold the hinged lower-lip and note that its broad tip is composed of two jaw-like flaps, each Dra|on-fly; sien fringed on its inner margin with fine teeth. Ex amine the hinge, and note how far this grasping lower-lip is Fier. -1'. Yoiu]g thick-bodied kind. Fig. -J.^. Youug ragoD-fly; slen- der-bodied kind,. 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 a
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