File:Image from page 29 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) (14782592604).jpg

Aeshna old larva or pupa

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: MBLWHOI Library

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Text Appearing Before Image: tates.In general appearance they resemble rove-beetles, but differfrom them in having a pair of forceps at the posterior endof the body. They hide, during the day, in the corollas of v» *« * T **f» r . /~ <^n V c.. FIG. 8. — Two North American Odonata, belonging to the family Libelhilid:About one-half nat. size. Photo, by V. H. L. flowers, upon which they feed, and fly about at night. Thename earwig seems to have arisen from an unwarrantedbelief that these insects penetrate into the ears of personswhen asleep. They were especially dreaded on accountof a fear that thev mio-ht thus penetrate into the brain. V O A The Odonata,2 or dragon-flies, have four membranous, net-veined wings, of which the front pair are never larger thanthe hind ones. Their large heads carry relatively enormouseyes. Two groups of dragon-flies may be distinguishedaccording as the wings, at rest, are extended (Fig. 8) or 1 forfiwila, a small forceps. 65ovs, tooth, from the teeth of the mandibles. 10 ZOOLOGY

Text Appearing After Image: folded together over the back. Dragon-flies live on thewing, hovering over water and preying upon other insects, especially mosquitoes. The eggs developin the water into aquatic larvae which arequite unlike the adult. Especially thejaws are peculiar, being jointed and capa-ble of sudden protrusion, in order to catchthe animals which serve as prey. Theselarvee are easily reared over winter in anaquarium, where not only their ferocioushabits, but also their peculiar method ofbreathing by means of water taken in atthe anus, may be observed (Fig. 9). The Ephemeridae,1 or May-flies. TheFIG. 9. - - JEschna, adult May-fly possesses finely veined fore old larva, or pupa. . 1-1 ^ ^ , i , i Nat. size. Photo, wings, winch are much larger than theby w. H. C. P. hind wings. The mouth parts are rudi- mentary and the abdomen terminates intwo or three filamentous appendages. As their systematicname implies, they have a very ephemeral existence inthe imago state. The imago appears in swarms early inth

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