双翅目

Pseudopodia are characteristic of many dipterous larvae.

伪足为多数双翅目所特有。

In hemicephalous larvae, the head and its appendages are reduced and partially retracted into the thorax.

半头型无足头部部分退化，后端缩入胸部，如双翅目大蚊及一些寄生性翅目。

The mines of Hymenoptera wasps have more and darker frass than the mines of dipetrous flies.

与双翅目相比，翅目蜂类粪便更多更黑；鞘翅目甲类则经常造成叶刻。