Habitat
Warm and arid places. Mainly deserts and sandy places, but some species are found in forests and grasslands.
Food
Voracious predators: Invertebrates and
small vertebrates. Will scavenge on dead creatures as well as hunt live prey.
Remarks
Although they lack venom, the strong jaws of these creatures may inflict a sharp bite in self-defense if handled. The most common species are quite small and can hardly be felt except for a slight "pinch". Larger species, such as in the genus Eremorhax, have been known to draw blood, which should be immediately disinfected as one would treat any bite.
According to
Wikipedia: "Solifugae are the subject of many urban legends and exaggerations about their size, speed, behavior, appetite, and lethality. They are not especially large, the biggest having a leg span of perhaps 12 centimeters (5 in)."
Biodiversity Explorer says: "They vary in size and in the arid areas of southern Africa they can reach 70 mm and with legs included, can measure 160 mm."
Internet References
Snope.com Debunking of Camel Spider myths, some general information about Solifugae.