The Collaborative International Dictionary of English v.0.48:

Depeculation \De*pec`u*la"tion\, n. [L. depeculari, p. p.
   depeculatus, to rob. See Peculate.]
   A robbing or embezzlement. [Obs.]
   [1913 Webster]

         Depeculation of the public treasure.     --Hobbes.
   [1913 Webster]