The Collaborative International Dictionary of English v.0.48:

Citigradae \Cit`i*gra"d[ae]\, n. pl. [NL., fr. L. citus swift
   (p. p. of cire, ciere, to move) + gradi to walk. See Cite.]
   (Zool.)
   A suborder of Arachnoidea, including the European tarantula
   and the wolf spiders (Lycosidae) and their allies, which
   capture their prey by rapidly running and jumping. See Wolf
   spider.
   [1913 Webster]