No lady should detain her partner long in the supper-room; she may be thus forcing him to be guilty of the rudeness of breaking an engagement with another lady for the following dance. No gentleman should linger round the supper-table. Your hostess invites you to a ball to dance, and be agreeable, not to haunt her supper-room, as if you were starving. Avoid all absence of mind, staring, listlessness, and other eccentricities. Never swing your arms about, and try to avoid being conspicuous in any way. Take the partner with whom you may happen to be dancing when supper is announced to the supper-table, unless she has come with a gentleman, in which case you must not usurp his privilege. If she is disengaged, escort her to a seat in the supper-room, if possible, and see that she is served with the dishes she selects. Do not take your own supper at the same time; wait till the lady has finished; then take her back to the ball-room, and repeat the process, if necessary, with some other lonely damsel. When all the ladies have been once to the supper-room, the gentlemen may think of their own supper. Gloves of white kid must be worn during the entire evening, and it is well to have a fresh pair in readiness to put on after supper. On quitting a ball, it is not necessary to take a formal leave of the hostess. Indeed, it is preferable to make your departure as quietly as possible, in order to prevent the others from thinking it later than perhaps it is, and so breaking up the ball at an earlier hour than the hostess may desire. If a gentleman escorts a lady home from a ball, she is not obliged to invite him to enter, and if she does so, he must decline the invitation. He must, however, request permission to call the following day or evening, and he must make that call. A gentleman in a ball-room cannot be too careful not to injure the delicate fabric worn by the ladies around him. Spurs are in bad taste, even if a cavalry officer is otherwise in full uniform. While one dance is in progress, it is not in good taste to make arrangements for another. It is a gross breach of etiquette on the part of either a lady or a gentleman to forget a ball-room engagement. It is not according, to etiquette for married people to dance together at either a private or a public ball. MORNING AND EVENING PARTIES. PARTIES in the city comprise conversaziones, private concerts, private theatricals, soirees, dramatic readings, tea-parties, matinees--fact, almost any in-door gathering together of people, exclusive of balls and dinner companies. In the country, small dancing-parties, tea-parties, and conversaziones are also comprised under the head of parties; but the outdoor occasions are of much greater number and variety: croquet parties, sailing parties, boating parties, pic-nics, private fetes, berrying parties, nutting parties, May festivals, Fourth of July festivals --in fact, anything that will give an excuse for a day spent in out-door frolicking.