Report on the Noxious and Beneficial Insects of the State of Illinois Volume 8-9

Report on the Noxious and Beneficial Insects of the State of Illinois Volume 8-9

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 edition. Excerpt: ...Insect mite-parasites. Iwodidw, Ticks. Halacaridae, Marine mites. Oribatidze, Beetle-mites. Acaridw." Sub-fam. I. He/poderinae, Sabcutaneous mites. ' 2. II;/popinae, Ichneumon mites. 3. T_z/roglyphinae, Cheese mites. 4. Sarcoptinae, Itch and louse mites. 5. 1'h.g/toptinae, Gall and bud mites. The scab mite of the sheep, which is now believed to be the same species as that infesting the horse and ox, belongs to the eighth family, Acariolae, and fourth osub-family, Sarcoptinae, which also contains the human itch mite, or mite that produces the disease in man known as the itch. ' The scab, as all are aware, is a skin disease analogous to the mange in the horse and itch in man, and, like these, is produced by a very small mite. It was for a very long time supposed that this mite was produced spontaneously, by an unhealthy and unclean condition of the flocks, or from insuflicient or improper food, etc., and not from a preceding parent. According to Westwood, two such able entomologists as Burmeister and Kollar leaned to the idea of equivocal gener ation of these parasites. But such erroneous ideas as these in refer-_ ence to these mites have at last been corrected--at least so far as authors and naturalists are concerned--as it is now known that they are produced from eggs, deposited by parents similar to themselves. As before stated, the species belonging to the class Arachnida, are distinguished from insects and most other minute animals, by the fact that they possess four pairs of legs; though there are some exceptions to this rule among the mites, some of which, in the perfect or full grown state, and several in the immature state, having only three pairs. The sub-family Sarcoptinae is distinguished from the other groups of more

Product details

  • Paperback | 260 pages
  • 189 x 246 x 14mm | 472g
  • United States
  • English
  • black & white illustrations
  • 1236768043
  • 9781236768049