Liocranidae

Liocranidae is a family of araneomorph spiders, consisting of about 160 species of wandering spiders in 30 or so genera. Along with other groups, they are sometimes called "sac spiders". The best known are those in the Holarctic genus Agroeca. Various genera of rather obscure spiders are included in the family, which still lacks a diagnosis. Two species in the North American genus Neoanagraphis are found in often hyperarid conditions in the Mojave, Sonoran and Chihuahuan Deserts. The females apparently live in animal burrows and the males wander and are often caught in pitfall traps.