It is known as the gregarious antlion as it is often found in swarms in long grass in the shade of trees.

[1] The range of this species extends from eastern South Africa to Cameroon and Ethiopia; it is also found in Madagascar.

The larvae build sand pit traps to capture prey.

Media related to Hagenomyia tristis at Wikimedia Commons

This Antlion (Myrmeleontidae)- related article is a stub.