. Nature-study; a manual for teachers and students. Nature study. iga NATURE-STUDY an adult dragon-fly. But the wings are not yet expanded. They are mere fleshy lumps upon the back. The insect graduaUy inflates these fleshy masses until they become the beautiful, transparent wings. After waiting a short time for the wings to stiffen, the insect begins its swift, aerial hfe. Empty nymph cases are common sights along ponds and lakes. This interesting emer- gence of the dragon-fly from the nymph may be observed by visiting a pond when these insects begin to be abundant. Or, better still, collect
. Nature-study; a manual for teachers and students. Nature study. iga NATURE-STUDY an adult dragon-fly. But the wings are not yet expanded. They are mere fleshy lumps upon the back. The insect graduaUy inflates these fleshy masses until they become the beautiful, transparent wings. After waiting a short time for the wings to stiffen, the insect begins its swift, aerial hfe. Empty nymph cases are common sights along ponds and lakes. This interesting emer- gence of the dragon-fly from the nymph may be observed by visiting a pond when these insects begin to be abundant. Or, better still, collect some of the nymphs about this time and place them Fio. SI. â¢â H aif and Half" Wing of a Hemipterous in the aquarium, and you may be fortunate enough to see the whole process in the school-room. This development of the dragon-fly is called direct, and is not marked by a dormant period. Damsel-flies and May-flies have a similar life history. The Electric-Light Bug or Giant Water-bug represents another order. It is found in quiet pools and swamps, on the muddy bottom, or under submerged sticks and stones. At night it often leaves the water and, attracted jjy the arc lights of the streets, it may often be found in large numbers under the lamps. The giant water-bug is one of our largest insects. It is about two inches in length, and is admirably adapted for the study. fnsect or Bug. (Pliutumicrogriiiih.). 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 Holtz, Frederick Leopold, 1870-. New York, C. Scribner's Sons
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