This is the season when Fashion is more perplexed than at any other, in her endeavors to give humanity a seasonable garb. Boreas and Zephyrus often bear rule on the same day, one reigning with mildness in the morning, the other despotically at evening. Those votaries of Fashion are the wiser, who pay court to the former; for, generally, it is almost June, in our Northern States, before we may be certain that the chilling breath of early Spring will be no more felt.

This being the season for rides and promenades, our illustrations for this month are devoted chiefly to the representation of appropriate costume for those healthful exercises in the open air. The large figure in our first plate, represents an elegant style of promenade dress. Pardessus are much worn at this season, made in a lighter manner than those used earlier. Velvet pardessus with silk or satin linings, but not padded, are used. Our illustration represents one of black velvet, trimmed with several narrow rows of satin of the same color. The dress is amber-colored figured silk, with a very full plain skirt. Capotes or bonnets of satin are also worn. An elegant style is made of violet velvet and satin, ornamented with heart's-ease almost hidden within coques of satin and velvet, which are arranged in a tasteful manner upon the exterior of the capote, the interior being decorated with heart's-ease to match, which may or may not be intermixed with lace or tulle, according to the taste of the wearer.

Costumes for young misses are also represented in our first illustration. The larger one has a dress of a pale chocolate cachmere, trimmed with narrow silk fringe; the double robings on each side of the front as well as the cape, on the half-high corsage, ornamented with a double row of narrow silk fringe. This trimming is also repeated round the lower part of the loose sleeve. Chemisette of plaited cambric, headed with a broad frill of embroidery; full under-sleeves of cambric, with a row of embroidery round the wrist. Open bonnet of pink satin, a row of white lace encircling the interior next the face. Boots of pale violet cachmere and morocco. Trowsers of worked cambric. The smaller figure has a frock of plaided cachmere. Paletot of purple velvet, or dark cachmere; a round hat of white satin, the low crown adorned with a long white ostrich feather. Trowsers and under-sleeves of white embroidered cambric. Button gaiter boots of chocolate cachmere.

Figure 2 represents a most elegant costume for an evening party, or a ball. It is composed of a beautifully embroidered white satin dress, the skirt looped up on the right side, and decorated with a bunch of the pink honey-plant, heading three pink and white marabout tips, from which depend three ends of deep silk fringe, pink and white. Low pointed corsage, the top of which is encircled with a small embroidered pointed cape, edged as well as the short sleeves with a deep pink and white fringe, and confined upon the centre with a cluster of feathers and flowers, decorated in the centre with a butterfly composed of precious stones. The hair is simply arranged with a narrow wreath of pink and white velvet leaves, finished on the right side with two small marabout feathers, and two ends of fringe drooping low.

Figure 3 is a morning promenade costume. A high dress of black satin, the body fitting perfectly tight; a small jacket cut on the bias, with two rows of black velvet laid on a little distance from the edge. The sleeves are rather large, and have abroad cuff turned back, which is trimmed to correspond with the jacket. The skirt is long and full; the dress ornamented up the front in its whole length by rich fancy silk trimmings, graduating in size from the bottom of the skirt to the waist, and again increasing to the throat. Bonnet of plum-colored satin; a bunch of heart's-ease, intermixed with ribbon, placed low on the left side; the same flowers, but somewhat smaller, ornament the interior.

Figures 4 and 5 represent different styles of head-dresses for balls or evening parties. Figure 4 is a combination of flowers and splendid ribbons, with a fall on each side, of the richest lace. Figure 5 is very brilliant. It is a wreath of Ceres form, composed of small flowers in rubies, emeralds, and diamonds, perfectly resembling natural flowers, with ears of wheat freely intermingled. At this season the head-dresses are chiefly of the floral description. Feathers and flowers intermixed, form a very beautiful coiffure.