The fact that it was customary to catch several specimens of the culprits and bring them before the seat of justice, and there solemnly put them to death while the anathema was being pronounced, proves that this summary manner of dealing would have been applied to the whole of them, had it been possible to do so. Indeed, the attempt was sometimes made to get rid of them by setting a price on their heads, as was the case with the plague of locusts at Rome in 880, when a reward was offered for their extermination, but all efforts in this direction proving futile, on account of the rapidity with which they propagated, recourse was had to exorcisms and be-sprinklings with holy water. D’Addosio speaks of the actions brought against domestic animals for homicide as penal prosecutions, and those instituted against insects and vermin for injury done to the fruits of the field as civil suits (_processi civili_); but the latter designation is not correct in any proper sense of the term, since these actions were not suits to recover for damages to property, but had solely a preventive or prohibitive character. The judicial process was preliminary to the utterance of the malediction and essential to its efficacy. Before fulminating an excommunication the whole machinery of justice was put in motion in order to establish the guilt of the accused, who were then warned, admonished, and threatened, and, in cases of obduracy, smitten with the _anathema maranatha_ and devoted to utter destruction. As with all bans, charms, exorcisms, incantations, and other magical hocus-pocus, the omission of any formality would vitiate the whole procedure, and, by breaking the spell, deprive the imprecation or interdiction of its occult virtue. Ecclesiastical thunder would thus be robbed of its fatal bolt and reduced to mere empty noise, the harmless explosion of a blank cartridge.