upon which the national government might have acted for the general improvement of internal communication or development of agricultural resources. Some of the best citizens have written and labored in behalf of national industry in all its usual or possible manifestations; but we fear that many years of profound peace must be ensured to Mexico before the farmer will be able to share in the blessings of commerce by means of exportation. [Illustration: ARRIEROS AND MULES.] The great CORN LANDS of Mexico are those of Puebla;--the Bajio, which comprises portions of the state of Guanajuato, Queretero, Valladolid, Zacatecas, and Guadalajara, in the vicinity of the Rio Santiago;--the valley of Mexico, in the state of Mexico;--the valley of Poañas, in Durango;--and it is calculated that the cleared ground in these districts is capable of producing _cerealia_ for a population five times greater than that of Mexico at present. Corn, in the states of Mexico and Puebla is worth two dollars the _fanega_ of one hundred and fifty pounds; in Oajaca about one dollar for the same quantity. Its value is every where irregular, and no general tariff of prices can be assigned to Mexican breadstuffs until some great national market shall be established or Mexico becomes an exporting country. Neighborhoods, at present establish prices. MAIZE or CORN, is a gift from the New World to the Old, and is unquestionably the favorite food of the great mass of the inhabitants of our continent. In Mexico, every household is furnished with it abundantly, and all classes use it habitually. Although this plant is a native of America it is never found growing wild in the republic. Single stocks may be occasionally seen in remote or uninhabited districts, but they are rarely met, and, in all likelihood, have been sown by the flocks of robber birds who ravage the Mexican _milpas_ or corn fields during the ripening season. The best cultivated varieties in Mexico, are: 1st. _Maiz de padus_; with small ears, of eight rows, and the most unimportant of all the varieties raised in the country. 2d. _Maiz manchado_, or _chiniesco_; a productive species with white, yellow and red grains;--sometimes also entirely blue, in which case, it is called _pinto_. 3d. _Maiz blanco_; a very productive kind, yielding a fine sweet meal. 4th. _Maiz amarillo_; this is sub-divided into:--1st, _maiz amarillo grueso_, which is very generally cultivated and rarely yields less than two or three ears each, with from three to six hundred kernels or grains. 2d, _maiz amarillo pequeno_, is smaller and less stout; but in a fruitful soil its yield weighs from ten to fifteen hundred weight, more than the _grueso_. 5th. _Maiz cuarentino_; or quarentine corn; better known in Mexico under the name of _maiz tremes_, or, _olote colorado_, which ripens quickly and may be planted in the coldest parts of Mexico.