File:The biology of dragonflies (Odonata or Paraneuroptera) (1917) (20194221420).jpg

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Title: The biology of dragonflies (Odonata or Paraneuroptera)
Identifier: biologyofdragonf00till (find matches)
Year: 1917 (1910s)
Authors: Tillyard, Robin John, 1881-1937
Subjects: Dragon-flies
Publisher: Cambridge (Eng. ) : University Press
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive

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Ill) THE WINGS 65 Sectors, Supplements, Bridges, Transverse Veins. The term sector in Odonata is usually restricted to extra veins developed along definite tracheal branches; while intercalated veins formed in any position without the aid of a definite tracheal branch are called supplements. The distinction is somewhat arbitrary, since two or three very distinct tracheae may aid in
Text Appearing After Image:
Fig. 23. Comparison of venation of the Synlestinae and the Megapodagrioninae. A. Synlestes weyersi Selys, venation (wing 31 mm.), b. The same, more enlarged tracheation of the larval wing in the region of the long bridge, c. Enlarged tracheation of larval wing of Argiolestes icteromelas Selys. D. The same species, imaginal wing-venation (wing 28 mm.); notice absence of bridge. Br bridge; Ms Zygopterid sector; 0 oblique vein. Original. the formation of a strong supplement (e.g. Mspl in Aeschna). A bridge is a supplement formed backwards towards the base of the wing in such a way as to continue the line of an important vein, so that this latter may appear much longer in the imaginal venation than it really is when the tracheation is examined. T. D.-F. 6

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Flickr tags
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  • bookid:biologyofdragonf00till
  • bookyear:1917
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Tillyard_Robin_John_1881_1937
  • booksubject:Dragon_flies
  • bookpublisher:Cambridge_Eng_University_Press
  • bookcontributor:University_of_California_Libraries
  • booksponsor:Internet_Archive
  • bookleafnumber:87
  • bookcollection:cdl
  • bookcollection:americana
  • BHL Collection
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7 August 2015

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