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