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Topic: Vespa crabro


  
  Hornet   (Site not responding. Last check: 2007-10-12)
The true hornets make up the genus Vespa, and are distinguished from other Vespids by the width of the vertex (part of the head behind the eyes), which is proportionally larger in Vespa; and by the anteriorly rounded gasters (the section of the abdomen behind the wasp waist).
The genus Vespa comprises about 20 species, most of which are native to tropical Asia, but there is a species found across temperate Eurasia from Great Britain to Japan (V.
In Vespa crabro, the nest is founded in spring by a fertilized female, known as the queen.
www.freedownloadsoft.com /info/hornet.html   (910 words)

  
 Insect
Many species of insects have since then reduced this number by losing or fusing some of the abdominal ganglions and/or fusing those in the thorax.
Some cockroach have just six ganglia in the abdomen, whereas the wasp Vespa crabro have reduced the number further with only two in the thorax and three abdominal.
And then finally insects like the well known housefly have fused all the body ganglions into on big thoraic ganglion.
www.brainyencyclopedia.com /encyclopedia/i/in/insect.html   (3306 words)

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