see text Pegesimallus is a genus of robber flies.

[1] These species spend much of their time perched in the shade on shrubs or grass, where they lie in wait for flying insects.

Their prey includes a wide variety of arthropods; Hymenoptera and Diptera predominate.

[2][3] The classification of the species in this genus is difficult for two main reasons: Firstly, many are sexually dimorphic to the extent that females and males of the same species were, for some time, placed in different genera; and secondly, some of the species are so similar that they can only be separated by considering details of the male genitalia.

This article related to members of the fly family Asilidae is a stub.