. The transformations (or metamorphoses) of insects (Insecta, Myriapoda, Arachnida, and Crustacea) : being an adaptation, for English readers, of M. Émile Blanchard's "Metamorphoses, moeurs et instincts des insects;" and a compilation from the works of Newport, Charles Darwin, Spence Bate, Fritz Müller, Packard, Lubbock, Stainton, and others. THE ROSE Aphis. o{ ApJiidiC does not produce those like unto itself, but perfectmale and female individuals with Avings. All the generations ofimperfect females are not born from eggs, but they are bornalive, and they may be traced with the microscope lik
. The transformations (or metamorphoses) of insects (Insecta, Myriapoda, Arachnida, and Crustacea) : being an adaptation, for English readers, of M. Émile Blanchard's "Metamorphoses, moeurs et instincts des insects;" and a compilation from the works of Newport, Charles Darwin, Spence Bate, Fritz Müller, Packard, Lubbock, Stainton, and others. THE ROSE Aphis. o{ ApJiidiC does not produce those like unto itself, but perfectmale and female individuals with Avings. All the generations ofimperfect females are not born from eggs, but they are bornalive, and they may be traced with the microscope like littlebuds within the old ones. Bonnet, Reaumur, Owen, Huxley,Cams, Leydig, and Balbiani especially have studied these interest-ing insects. As soon as they are hatched the imperfect femalesbegin to grow and increase in size, and they attain their fulldimensions in ten or twelve clays ; and then these curious little insidebuds are born at the rate of three, four, or seven a day. Whenthey are born they are miniatures of their mother, and in tendays they begin to produce others. The second generation does THI-: ;8i the same, and so on until the ninth or tenth. Then the imperfectfemales have inside buds, which, when born, are not miniatures oftheir mother, but resemble the parents which laid the eggs the year. COClllMiAl, {CoCCUS lUCli.) before. These grow rapidh, and soon fl)-, and la\- eggs in theirturn. It is very evident that simple arithmetic can show that oneplant louse might produce a quintilli(Tn during one year. It iseas\- then Id undcrslaiul the occurrence of enormous multitudes !82 TRAlVSFOKMATIOAS OF INSECTS. and the sudden appearance of thousands of these insects upondifferent plants. Fortunately they have a crowd of enemies, other-wise they would do a vast amount of harm to vegetation. Theyare found on almost every kind of plant, and upwards of threehundred species have been described. The hop Aphis sometimesnearly ruins the crop, and the rose A
Size: 1458px × 1714px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjec, booksubjectcrustacea
