MORITZ RUGENDAS, a German artist, who has lately spent a considerable time in Mexico and the countries of South America, is now engaged at Munich, in arranging the pictures for which his journeys in those countries furnished him the materials. A work of such magnitude has never before been undertaken by any artist. He intends to treat each country in a continuous series of views. The Mexican series is now nearly completed, consisting of about 100 landscapes, in oil. It begins with Vera Cruz, where the artist landed, and goes through the whole country to the Pacific. First is the coast seen from the sea; next we behold the coast with the sea as it appears inland; then we mount to the plains, noticing the gradual change of the mountain formations, and the vegetation, with views in every direction from each interesting point; we pass through the great plateau, ascend the volcanoes and survey their craters, and admire the beauty of the region about the city of Mexico. From the city there are sketches of journeys in every direction, and at last we traverse the palm forest of St. Jago, and stand upon the heights whence the eye reaches to the Pacific. Every picturesque scene is finished with the greatest care and with special regard to the natural features of the landscape. Buildings and human figures are either avoided altogether or used as merely subordinate. When Mexico is completed, Rugendas will use in a similar manner the sketches he has taken in other countries. It is not known whether his pictures will be engraved or not. They will, we believe, become the property of the Royal Pinakothek, at Munich. * * * * * The painters at Vienna have formed an Art-Union, which is succeeding in its first exhibition, which is now open. Some well-known artists of Germany have sent pictures. Foltz, of Munich, has a landscape with a flock of sheep; Zimmerman a landscape with effect of sunlight; Huelner, of Duesseldorf, a boy reading the Bible to his mother, Vienna. Koeckoeck, of Holland, has two landscapes. The artists of Vienna have also not been backward. Among the names of the exhibitors we notice that of Waldmueller, who is known in this country for his picture of the Children leaving School, which was drawn a year since by one of the subscribers to the International Art-Union, and was regarded as one of the chief attractions of its collection. * * * * * We hear from Berlin that KAULBACH has painted in miniature the Four Evangelists, in a copy of Luther's translation of the New Testament, which is destined for the World's Fair. The book is a folio; the leaves are of vellum, and the printing is done in Gothic letters and in various colored inks by four accomplished masters of calligraphy. These artists have also ornamented their work with numerous vignettes. The book is now being exhibited at the Royal Library in Berlin. * * * * *