Anoplius viaticus is one of the largest (14mm) and most spectacular spider-hunting wasps, with striking red and black bands on the abdomen. They are found entirely in sandy habitats and overwinter as adults, resulting in their being active from March onwards. This is much earlier than the vast majority of Pompilidae – the only others around in early spring are similarly overwintering species Priocnemis coriacea, Priocnemis perturbator and Priocnemis susterai. The hibernation occurs in deep burrows.
Prey is varied but consists principally of Lycosidae.