Insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing.

 
  • 通常有一對實(shí)用翅膀(前翅)的昆蟲(chóng),后翅退化為小圓塊,嘴分裂適于吮吸或舔食或刺穿。
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