Lewis Short
formīcātĭo (noun F) : formico
* An irritation of the skin resembling the crawling of ants, produced by pustules; Gr. μυρμηκία: corporum,Plin. 28, 7, 20, § 71; Cael. Aur. Tard. 5, 1, 2: eorum articulorum, qui tanguntur,id. ib. 5, 2, 30.
Charlton T. Lewis, Charles Short, A Latin Dictionary