Satyrs and Centaurs was merely an artistic and literary convention, and that in popular speech the name Centaur was applied to both without discrimination. But it does not really concern us to argue at length the question whether the common-folk in antiquity never distinguished, or, having once distinguished, subsequently confused the Satyrs and the Centaurs. It is just worth noticing that it was in art of the Greco-Roman period, so far as I can discover, that horse-centaurs first began to be represented along with Satyrs and Sileni in the entourage of Dionysus; and if this addition to the conventional treatment of such scenes was made, as seems likely, in deference to popular beliefs, the date by which the close association of the two classes was an accomplished fact and confusion of them therefore likely to ensue is approximately determined.
At some date therefore probably not later than the beginning of our era, the generic name of Centaur comprised several species of half-human, half-animal monsters, of whom the best known were horse-centaurs, ass-centaurs, Satyrs, and Sileni; and each of these species, it will be seen, has contributed something to one or other of the many types of the modern Centaurs, the Callicantzari.
The horse-centaur, which was the favourite species among the artists of ancient times, has curiously enough had least influence upon the modern delineation of Callicantzari. The only attribute which they seem to have received chiefly from this source is the rough shaggy hair with which they are usually said to be covered; 'shaggy' is Homer's epithet for the Centaurs[1], and the hippocentaurs of later art retained the trait; for it is specially noted by Lucian that in Zeuxis' picture the male hippocentaur was shaggy all over, the human part of him no less than the equine[2].
The ass-centaur on the contrary is rarely mentioned by ancient writers, but has contributed largely to some presentments of the Callicantzari. Aelian mentions the name, in the feminine form [Greek: onokentaura], but the monster to which he applies it, although true to its name in that the upper part of its body is human and the lower part asinine, is not a creation of superstitious fancy, but, as is evident from other facts which he mentions, some species of
