In hemicephalous larvae, the head and its appendages are reduced and partially retracted into the thorax.
半头型无足幼虫头部部分退化，后端缩入胸部，如双翅
的大蚊及一
性膜翅幼虫。
In hemicephalous larvae, the head and its appendages are reduced and partially retracted into the thorax.
半头型无足幼虫头部部分退化，后端缩入胸部，如双翅的大蚊及一性膜翅幼虫。
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