File:American insects (1905) (14578305279).jpg

Identifier: americaninsects00kellog (find matches)
Title: American insects
Year: 1905 (1900s)
Authors: Kellogg, Vernon L. (Vernon Lyman), 1867-1937
Subjects: Insects
Publisher: New York, H. Holt and Company
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Smithsonian

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is as truly and as importantly anattribute of this particular species of butterfly as its characteristic colorpattern or body structure. And the female of the great flashing strong-winged dragon-fly, queen insect of the air, when egg-laying time comes,feels a strange irresistible demand to get these eggs into water, droppingthem in from its airy height, or swooping down to touch the tip of the abdo- 4° Development and Metamorphosis men to the waters surface, there releasing them, or even crawling downsome water-plant beneath the surface and with arduous labor thrusting theeggs into the heart of this submerged plant-stem. From the eggs hatchwingless dwarf-dragons of the pond bottom, with terrible extensile, clutch-ing mouth-parts and an insatiable hunger for living prey. So our young insects, after completing their embryonic development,come to the time of their appearance as free individuals compelled to findtheir own food and no longer sheltered by a firm egg-shell from the strenu-
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FiG. 70.—Series of stages in development of egg of fish-moth, Lepisma sp. A, begin-ning embryo; B, embryo showing segmentation; C, embryo showing appendages;D, embryo more advanced; E, embryo still more advanced; F, embryo still olderand removed from egg; G, embryo removed from egg at time of readiness to hatch.y., yolk; emb., embryo; ser., serosa; am., amnion; ant., antenna; lb., labrum;md., mandible; mx., maxilla; vrx.p., maxillary palpus; li., labium; H.p., labialpalpus; /.. I2, P, legs; pr., proctodaeum, or intestinal invagination; cer., cerci; mp.,middle posterior process. (After Heymons; greatly magnified.) ous fighting and hiding of the open road. Now these young insects, depend-ing upon how far they have carried their developmental course in the egg,hatch either almost wholly like their parents (excepting always in size), orin a condition fairly resembling the parents, but lacking all traces of wingsand showing other less conspicuous dissimilarities, or finally they may appe

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