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Home > Art, Film & Photography > Half Hours with Insects
Half Hours with Insects

Half Hours with Insects


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1877 Excerpt: ...along the side of the body. The air is really introduced under the head and front thorax. The head is large and very movable, as well as the prothorax. It slides back and forth on a thin membrane, from the surface of which it can be raised. So with the hinder edge of the prothorax, which rides over the membranous hind thorax, which it nearly conceals. When the Corixa rises to the surface it floats in a horizontal position, the hind edge of the head and the prothorax rising slightly above the surface. Now slightly raising the back of the head and the hind edge of the prothorax a space appears in front of and behind the prothorax, by which the air passes into the breathing holes beneath. This is proved by the small bubbles of air remaining in these two cracks. Two minute spiracles may be detected in deep pits, one on each side, just above the insertion of the legs, and from which the tracheae arise, each one dividing into three irregular short branches, as may be seen by detaching the segment and holding it up to the light. So much for those insects which simply rise to the surface and take in air without any special modification of the spiracles. We now come to a second group of adult insects which, by a change in the number, position and form of the spiracles, are provided with a special respiratory contrivance. A striking example is seen in Ranatra, the water stick bug. The end of this creature's body terminates in two thin tubes nearly as long as the insect itself, at the end of which are two spiracles, each connecting with a trachea. These long appendages, which are simply elongated spiracles, it thrusts out of the water, takes in its supply of air, and then goes on in its deliberate ramble. The Nepa of Europe has much shorter respirator tubes than Ranat...


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Product Details
  • ISBN-13: 9781152929258
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 86
  • Spine Width: 5 mm
  • Width: 189 mm
  • ISBN-10: 1152929259
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 168 gr


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