These had originally consisted entirely of shows of a military character, as we have seen in the case of the Ludi Romani, and especially of chariot-racing in the old Circus Maximus. The Romans seem always to have been fond of horses and racing, though they never developed a large or thoroughly efficient cavalry force. It is probable that the position of the Circus Maximus in the vallis Murcia[486] was due to horse-racing near the underground altar of Consus, a harvest deity, and the oldest religious calendar has Equirria (horse-races) on February 27 and March 14, no doubt in connexion with the preparation of the cavalry for the coming season of war. And in the very curious ancient rite known as "the October horse," there was a two-horse chariot-race in the Campus Martius, when the season of arms was over, and the near horse of the winning pair was sacrificed to Mars[487]. The Ludi Romani consisted chiefly of chariot-races until 364 B.C. (when plays were first introduced), together with other military evolutions or exercises, such perhaps as the ludus Troiae of the Roman boys, described by Virgil in the fifth Aeneid. Of the Ludi Plebeii we do not know the original character, but it is likely that these also began with _circenses_, the regular word for chariot-races. The Ludi Cereales certainly included circenses, and plays are only mentioned as forming part of their programme under the Empire; but on the last day, April 19, there was a curious practice of letting foxes loose in the Circus Maximus with burning firebrands tied to their tails[488],--a custom undoubtedly ancient, which may have suggested the _venationes_ (hunts) of later times, for one of which Caelius wanted his panthers. Of the other three ludi, Apollinares, Megalenses, and Florales, we only know that they included both circenses and plays; we must take it as probable that the former were in their programme from the first. There is no need to describe here in detail the manner of the chariot-racing. We can picture to ourselves the Circus Maximus filled with a dense crowd of some 150,000 people,[489] the senators in reserved places, and the consul or other magistrate presiding; the chariots, usually four in number, painted at this time either red or white, with their drivers in the same colours, issuing from the carceres at the end of the circus next to the Forum Boarium and the river, and at the signal racing round a course of about 1600 yards, divided into two halves by a spina; at the farther end of this the chariots had to turn sharply and always with a certain amount of danger, which gave the race its chief interest. Seven complete laps of this course constituted a missus or race,[490] and the number of races in a day varied from time to time, according to the season of the year and the equipment of the particular ludi. The rivalry between factions and colours, which became so famous later on and lasted throughout the period of the Empire, was only just