The writer of the Proverbs was therefore perfectly right when he alluded to the vegetable stores within the nest, and only spoke the truth when he wrote of the Ant that it was exceeding wise. Any one who wishes to test the truth of his words can easily do so by watching the first Ants' nest which he finds, the species of the Ant not being of much consequence. The nests of the Wood-Ant are perhaps the best suited for investigation, partly because the insect and its habitation are comparatively large, and, secondly, because so much of the work is done above-ground.
The most wonderful Ant in the world is one which hitherto is only known in some parts of America. Its scientific name is Atta malefaciens, and it has been called by various popular names, such as the Mound-making Ant and the Agricultural Ant on account of its habits, and the Stinging Ant on account of the pungency of its venom. This characteristic has gained for it the scientific name of malefaciens, or villanous.
The habits of this Ant were studied in Texas by Dr. Lincecum for the space of twelve years, and the result of his investigations was communicated to the Linnæan Society by C. Darwin, Esq. His abstract of Dr. Lincecum's observations may be found in the "Journal of the Linnæan Society," vol. vi. No. 21, page 29. It is so extraordinary an account that it must be given in the narrator's own words:—
"The following is merely an abstract of Dr. Lincecum's communication, containing only what appears to be most remarkable and novel in it in the way of observation.
"The species which I have named 'Agricultural' is a large brownish ant. It dwells in what may be termed paved cities, and, like a thrifty, diligent, provident farmer, makes suitable and timely arrangements for the changing seasons. It is, in short, endowed with skill, ingenuity, and untiring patience sufficient to enable it successfully to contend with the varying exigencies which it may have to encounter in the life-confiict.
"When it has selected a situation for its habitation, if on ordinary dry ground, it bores a hole, around which it raises the surface three and sometimes six inches, forming a low circular mound having a very gentle inclination from the centre to the outer border, which on an average is three or four feet from the entrance. But if the location is chosen on low, flat, wet land liable to inundation, though the ground may be perfectly dry at the time the ant sets to work, it nevertheless elevates the mound, in the form of a pretty sharp cone, to the height of fifteen to twenty inches or more, and makes the entrance near the summit. Around the mound in either case the ant clears the ground of all obstructions, levels and smooths the surface to the distance of three or four feet from the gate of the city, giving the space the appearance of a handsome pavement, as it really is.
"Within this paved area not a blade of any green thing is allowed to grow, except a single species of grain-bearing grass. Having planted this crop in a circle around, and two or three feet from, the centre of the mound, the insect tends and cultivates it with constant care, cutting away all other grasses and weeds that may spring up amongst it and all around outside of the farm-circle to the extent of one or two feet more.
"The cultivated grass grows luxuriantly, and produces a heavy crop of small, white, flinty seeds, which under the microscope very closely resemble ordinary rice. When ripe, it is carefully harvested, and carried by the workers, chaff and all, into the granary cells, where it is divested of the chaff and packed away. The chaff is taken out and thrown beyond the limits of the paved area.
"During protracted wet weather, it sometimes happens that the provision stores become damp, and are liable to sprout and spoil. In this case, on the first fine day the ants bring out the damp and damaged grain, and expose it to the sun till it is dry, when they carry it back and pack away all the sound seeds, leaving those that had sprouted to waste.
"In a peach-orchard not far from my house is a considerable elevation, on which is an extensive bed of rock. In the sand-beds overlying portions of this rock are fine cities of the Agricultural ants, evidently very ancient. My observations on their manners and customs have been limited to the last twelve years, during which time the enclosure surrounding the orchard has prevented the approach of cattle to the ant-farms. The cities which are outside of the enclosure as well as those protected in it are, at the proper season, invariably planted with the ant-rice. The crop may accordingly always be seen springing up within the circle about the 1st of November every year.