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Psyche Volume 1-2; A Journal of Entomology

Psyche Volume 1-2; A Journal of Entomology


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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: ... PSYCHE. ORGAN OF THE CAMBRIDGE ENTOMOLOGICAL CLUB EDITED BY GEORGE DIMMOCK AND B. PICKMAN MANN. Vol. II. Cambridge, Mass., July, 1879. No. 63. Pupation of the Nymphalidae. ABSTRACT. There is no more interesting phenomenon in insect transformation than the withdrawal of the chrysalis from the shrunken larval skin, and its firm attachment to the button of silk previously spun by the larva, in those Rhopalocera which suspend themselves perpendicularly during pupation. For a century and a half Reaumur's account, namely, that the soft segments of the forming chrysalis acted the part of legs by grasping the larval skin between the sutures, has been accepted and generally copied. Dr. J. A. Osborne, of Milford, England, first drew attention, some two years ago (Nature, v. 16, p. 502-503), to the fact thaj there was a membrane concerned in the act, and Mr. W. H. Edwards, of Coalburgh, West Virginia, corroborates Dr. Osborne's statement by observations on some of our American species, recorded in the Canadian Entokiologist of last December. In a paper recently presented to the Washington Philosophical Society, at its meeting of June 7th, Prof. C. V. Riley records the results of a number of observations on this subject, and thus explains the philosophy of the act which has so long misled observers. His studies have been principally made with the larvae of Vanessa antiopa, and we give the results as we have gathered them from correspondence with him. The principal means by which the chrysalis holds on, and rises at the critical moment, is a stout ligament, which is, virtually, the shed intestinal canal; not alone the lining, but the whole organ, which, as we know, becomes sub-obsolete in the imago state of so many Lepicloptcra. The ilium and colon are more particularly...


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Product Details
  • ISBN-13: 9781150965029
  • Publisher: General Books
  • Publisher Imprint: General Books
  • Height: 246 mm
  • No of Pages: 220
  • Spine Width: 12 mm
  • Width: 189 mm
  • ISBN-10: 1150965029
  • Publisher Date: 01 Feb 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 399 gr


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