Her thorax houses the machinery of walking and flying. Her thorax and the third section of her abdomen or trunk arise from the primitive chain of joined ring-like segments. In most insects the thorax consists of three sub-segments. Each sub-segment holds one pair of legs, but in the bee, the thorax has four divisions, the prothorax, the mesothorax, the metathorax and the propodeum. A bee's propodium is the first abdominal segment of most other insects. In bees this propodial segment has moved forward and joined with the thorax. The prothorax holds the first pair of legs. The meso and the metathorax have each a pair of legs, but the latter two segments also hold and control the two pairs of wings. A short peduncle or stalk connects the thorax with the abdomen.

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