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File:Economic entomology (1877) (20530027703).jpg

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Title: Economic entomology
Identifier: economicentomol00murr (find matches)
Year: 1877 (1870s)
Authors: Murray, Andrew, 1812-1878
Subjects: Beneficial insects; Insect pests; Thysanura
Publisher: (London) Chapman and Hall
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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Text Appearing Before Image:
io8 ARACHNOIDEA. No. K=^ CASE that the stems and branches of such trees seemed covered with VIIi a bright glaze. Can this be a fine web ? It is similar to the red spider in form, but a trifle smaller, more elliptical, slightly broader in front, and pale whitish â '^ellow instead of reddish. Like it, it is semi-opaque and velvety, the con- tained food being at times visible through the skin. The figure here given is a magnified representation of it. It covers the under side of the leaves with a slight web of silk, which gives it a brilliant surface. On this the mites move about with a good deal of quickness. They do not gnaw or eat away the leaves. Like their fellows, they merely suck the juice of the leaf; but although almost microscopic in size they make up for their minuteness by their numbers, and under their attacks the leaves rapidly shrivel up and die. They chiefly congregate on the under side of the leaf, those found on the upper side being mere wanderers, while on the under side they are sometimes crowded together in vast numbers ; for example, we have seen them so thick on the leaves that they looked as if they were not merely sprinkled with a yellow orange- coloured powder, but as if it was actually in parts heaped up on them, so that none of the green colour of the leaf was visible. Their appearance in such excessive numbers is said to follow certain peculiar states of the atmosphere.
Text Appearing After Image:
Tetranychus tiliarum. The Lime Tree mite.

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Flickr tags
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  • bookid:economicentomol00murr
  • bookyear:1877
  • bookdecade:1870
  • bookcentury:1800
  • bookauthor:Murray_Andrew_1812_1878
  • booksubject:Beneficial_insects
  • booksubject:Insect_pests
  • booksubject:Thysanura
  • bookpublisher:_London_Chapman_and_Hall
  • bookcontributor:Smithsonian_Libraries
  • booksponsor:Biodiversity_Heritage_Library
  • bookleafnumber:142
  • bookcollection:biodiversity
  • BHL Collection
  • BHL Consortium
Flickr posted date
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5 September 2015
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21 September 2015

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