An Odd Idea.—Among amusements, the latest novelty we notice is the excentrio target at Mr. John Travis' Pistol Gallery, on St. Charles street. A shot, skillful enough to strike the “ bull's eye. sets in motion certain ingenious machinery behind the scenes, and the uninitiated sportsman is amazed at beholding the target slowly open in the centre, disclosing the figure of a beautiful dancing girl, who stands before him in the attitude of cutting an extra pigeon wing, and it is then hidden from view by the closing of the iron slab. Whenever we saw this occur, it appeared to us precisely as If the lady knew when a good shot was made, and wished to know who had fired the pistol.—N.