The Collaborative International Dictionary of English v.0.48:

Formicate \For"mi*cate\, a. [L. formica an ant.] (Zool.)
   Resembling, or pertaining to, an ant or ants.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

formicate
    v 1: crawl about like ants