An Introduction to Entomology

An Introduction to Entomology : Vol. III (of 4)

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Description

"[...]Hexapod Aptera, and the Myriapoda. I shall next copy for you Latreille's latest definition of Insecta and Arachnida. "Insecta: A single dorsal vessel representing the heart: two trunks of tracheae running the whole length of the body, and opening externally by numerous spiracles; two antennae; very often upper appendages for flight, indicating the metamorphosis to which the animal is subject when young; legs most commonly reduced to six. Arachnida: Distinguished from Crustacea by having their respiratory organs always internal, opening on the sides of the abdomen or thorax to receive the respirable fluid. Sometimes these organs perform the office of lungs, and then the circulation takes place by means of a dorsal vessel, which sends forth arterial, and receives venose branches. Sometimes[...].""show more

Product details

  • Paperback | 542 pages
  • 152 x 229 x 28mm | 717g
  • Createspace
  • United States
  • English
  • black & white illustrations
  • 1507669909
  • 9781507669907