Source : Webster's Revised Unabridged Dictionary (1913)

Vagantes \Va*gan"tes\, p. pl. [NL., fr. L. vagans, p. pr. of
   vagari to stroll or wander.] (Zo["o]l.)
   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.