Source : Webster's Revised Unabridged Dictionary (1913)

Formicate \For"mi*cate\ (f[^o]r"m[i^]*k[=a]t), v. i. [See
   {Formication}.]
   To creep or crawl like ants; swarm with, or as with, ants.

         An open space which formicated with peasantry.
                                                  --Lowell.

Formicate \For"mi*cate\, a. [L. formica an ant.] (Zo["o]l.)
   Resembling, or pertaining to, an ant or ants.

Source : WordNet®

formicate
     v : crawl about like ants