. The popular natural history . Zoology. 5-;^ SA W-FLIES. bits of shells, or even small living shells, in which it lives in perfert security, and crawls about in search of food, dragging its house after it. When it is about to become a pupa, it spins a strong silk grating over the entrance of its case, so that the water necessary for its respiration can pass through, but at the same time all enemies are kept out. When the time for its change has arrived, the pupa bite â . through the grating, rises to the surface, and crawls out of the reach of the water, which would soon be fatal to it. The s
. The popular natural history . Zoology. 5-;^ SA W-FLIES. bits of shells, or even small living shells, in which it lives in perfert security, and crawls about in search of food, dragging its house after it. When it is about to become a pupa, it spins a strong silk grating over the entrance of its case, so that the water necessary for its respiration can pass through, but at the same time all enemies are kept out. When the time for its change has arrived, the pupa bite â . through the grating, rises to the surface, and crawls out of the reach of the water, which would soon be fatal to it. The skin then splits down the back, and the perfect in- sect emerges. The order is called Trichoptera, because the wings, instead of being covered with scales as are those of butterflies, are clothed with hairs.âThere are many species of Caddis- fiies. We now come to the vast order of insects technically called the HYMENOPTtRA. In these insects the wings are four in number, transparent, membranous, the veins compara- tively few, and the hinder pair smaller than the others. Their mouth is furnished with powerful horny jaws, and with a tongue guard- ed by the modified inaxillas. The females are armed with a many-valved sting or ovipositor. In this enormous order are included all the bees, wasps, and their kin, the great family of saw-flies, the ichneumons, the gall-flies, and the ants. We will proceed at once to the family of the Tenthredinids, or Saw-flies. In this and the next family, the females are furnished with a peculiar ovipositor, composed of several pieces. The true Saw-flies are known by the curious piece of animal mechanism from which they derive their name. The females of this family are supplied. Rhyssd 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 Wood, J. G. (John George), 1827-188
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
