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
大蚊及一些寄生性
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，如大蚊及一些寄生性幼虫。
The mines of Hymenoptera wasps have more and darker frass than the mines of dipetrous flies.
与相比，
粪便更多更黑；鞘甲虫则经常造成叶子缺刻。
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