. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. THE BEETLE 71. give light live on flowers, especially the goldenrod; the lumi- nous species are active at night. The light-giving organ lies in the abdomen. The larvae also are luminous and are known as glow- worms (Fig. 76). In several of the forego- ing families of beetles the adults live free, while the larvae penetrate into wood. In the family of bark- borers or engraver-beetles (Scolyt'idse^, however, the adult also lives and feeds in the innermost layers of Fig. 76.^a firefly, Photuris. a. larva; 1 -t
. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. THE BEETLE 71. give light live on flowers, especially the goldenrod; the lumi- nous species are active at night. The light-giving organ lies in the abdomen. The larvae also are luminous and are known as glow- worms (Fig. 76). In several of the forego- ing families of beetles the adults live free, while the larvae penetrate into wood. In the family of bark- borers or engraver-beetles (Scolyt'idse^, however, the adult also lives and feeds in the innermost layers of Fig. 76.^a firefly, Photuris. a. larva; 1 -t T +1-,' +U ^' ^^u^*- '^^® lines to the left of figures bark. In this case tne represent actual lengths of animals. adult beetle also is a lover I'rom Packard. of contact and darkness. As they eat in lines, a pattern is formed which is characteristic for each species. Along these hnes, niches are made in which eggs are laid and larvae hatch. The borings are injurious to the trees, often causing their death. Herbaceous plants also are infested by certain species. An example is the destructive Pine-borer (Fig. 77), which is common throughout the United States Fiu. 77.â Den- and Canada, droctonus, an ^^^ ^^ ^j^^ ^^^^ injurious of all the families engraver bee- *' tie. Magnified of beetles is that of the weevils (Curcu"lion'- "StandardNat- ^^'"^ ")â Most of our weevils are small, and their urai ; heads are drawn out into a long snout by. 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 Davenport, Charles Benedict, 1866-1944; Davenport, Gertrude Anna Crotty, 1866- joint author. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1911
