In hemicephalous larvae, the head and its appendages are reduced and partially retracted into the thorax.
半头型无足幼虫头
退化，后端缩入
，
双翅目的大蚊及一些寄生
膜翅目幼虫。
In hemicephalous larvae, the head and its appendages are reduced and partially retracted into the thorax.
半头型无足幼虫头退化，后端缩入，双翅目的大蚊及一些寄生膜翅目幼虫。
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