Identifier: introductiontozo00dave Title:
Introduction to zoology; a guide to the study of animals, for the use of secondary schools; Year:
1900 (
1900s) Authors:
Davenport, Charles Benedict, 1866-1944 Davenport, Gertrude Anna Crotty, 1866- Subjects:
Zoology Publisher:
New York, Macmillan company London, Macmillian and co., ltd. Contributing Library:
MBLWHOI Library Digitizing Sponsor:
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view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: e cave crickets, which arecolorless and blind. The Phasmidae^or walking-sticksand leaf-insects, display, to a mar-vellous degree, a protective resem-blance to the twigs and leaves amongwhich they live. The most remark-able forms live in the tropics. Theyhave large wings, which strikinglyresemble, in form, color, and vena-tion, either living or dry leaves.Upon those species which resembledried leaves, blotches looking likefungous patches are found. Eventhe legs may be thin and expanded,resembling foliage. In our countryonly the twig-like, wingless forms,or walking-sticks, occur. These in-sects are furthermore protected bychanges in color, corresponding withthe seasonal color changes in twio-s; o o for the young walking-sticks, which appear in the spring, are green like the twigs, but in the autumn they become gray or brown. Figure 5 shows our only common northern species, Diapheromera femorata. It feeds on leaves, especially those of the oak, and occasionally does much damage to trees. Text Appearing After Image: FIG. 5.— Diapheromera, walk-ing-stick of northern U. S.Nat. size. Copied fromPackard. appearance, spectre. 8 ZOOLOGY The Mantidael are popularly called praying-mantis, onaccount of the devotional attitude in which the greatly en-larged front legs are held. Unlike other Orthoptera, they Note About Images 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 work.