The Collaborative International Dictionary of English v.0.48:

Vagantes \Va*gan"tes\ (v[.a]*g[a^]n"t[=e]z), prop. n. pl. [NL.,
   fr. L. vagans, p. pr. of vagari to stroll or wander.] (Zool.)
   A tribe of spiders, comprising some of those which take their
   prey in a web, but which also frequently run with agility,
   and chase and seize their prey.
   [1913 Webster]