The street-cars run in groups. Instead of starting a car every ten minutes from the terminus, three are started together every half hour. One car is never seen alone, nor two together, but always three in a row, less than half a block apart. It requires two conductors to run a car. One approaches a passenger and sells him a ticket; the second one then comes in and takes it up. In some respects it is an improvement on the bell-punch system. There are first-class cars and second-class cars. The former are of New York manufacture, and similar to those used in that city; the latter are of domestic construction, have but few windows, and look like the cabooses used on railroad freight trains. First-class fares are sometimes as high as twenty-five cents, but are more often a _medio_ (six and a quarter cents), being governed by the distance. Second-class fares are always one-half the amount of first-class fares. Street-car drivers carry horns, and blow them when they approach street crossings. The conductors usually carry revolvers. Nearly everybody, in truth, carries a revolver. Horseback riding is the national amusement, and the streets are full of horsemen, particularly in the cooler hours of the morning and evening. The proper thing to wear is a wide sombrero, very tight trousers of leather or cassimere, with rows of silver buttons up and down the outer seam, a handsomely embroidered velvet jacket, a scarlet sash, a sword, and two revolvers, not to mention spurs of marvellous size and design, and a saddle of surpassing magnificence. A Mexican caballero often spends one thousand dollars for an equestrian outfit. His saddle costs from fifty dollars to five hundred dollars, his sword fifty dollars, his silver-mounted bridle twenty-five dollars, his silver spurs as much more, the solid silver buttons on his trousers one hundred dollars, his hat fifty dollars, and the rest of his rig in proportion. The Mexican small boy, if he has wealthy parents, is mounted after a similar fashion, even to the revolver and sword. An equestrian costume for a boy of ten years can be purchased for about fifty dollars, not including saddle and bridle. [Illustration: A MEXICAN CABALLERO.]