Stiletto fly larvae are voracious predators of soil-dwelling arthropods and are relatively abundant in sandy, xeric habitats, but very little is known about them. This paper addresses the species composition, abundance and seasonal flight periodicity of stiletto flies caught by a Malaise trap set in the Namib Desert, Namibia, for one year. Four species were collected in very different numbers. It is speculated that the two most abundant species are confined to the riparian zone where the trap was situated, while one of the two less numerous species inhabits the gravel plain, and the other the dune hummocks adjacent to the riparian zone. Keywords: Namibia, Namib Desert, soil-dwelling arthropods, desert invertebrates, predators, flies, xeric habitat, species composition, abundance, seasonality, root feeding larvae, arid environment, micro environment.